...believing they'll ride on a dragon's back and live in a magical castle, we give them therapy and some pills.
I recently returned from a vacation, and drove home from the airport to return to my house filled with small robots, vision-enabled game consoles, and mechanized automatons of all kinds. I guess I need some pills.
Sci-fi nerds think they'll ride on a spaceship and live on Mars
No, I don't think I will live on Mars, but I think that some human will, someday. The ultimate distinguishing feature of a human is the extent to which it modifies itself and its environment, so I find it perfectly reasonable to expect that the hostilities of another planet can be overcome with the right technology. There will need to be advances in several fields (rocketry, communications, biotech, medicine, and logistics, to name a few offhand), but we're close.
To make an analogy, if we were walking from New York to Los Angeles, we've probably hit the California state line by now. The road ahead is still going to take a lot of effort, and it's still going to take a long time. We're not done yet, and everybody knows it. There is some uncertainty as to exactly how long it will take to make those last few steps, but perhaps it's time to start thinking about what we'll do when we finally arrive at our destination.
I dream about the leisure society with basic income and healthcare for all, because we already have the technology and resources to do so.
Interesting. Are you actually an expert in what it takes to have a "leisure society with basic income and healthcare for all", and do you understand the sheer amount of resources required to make that happen? And you want that to happen for all people... Let's do some math*.
If we all split everything equally, then every human gets 71,538 square meters. That's it. That's your whole life. From that area's resources, you must derive your "basic income and healthcare" using today's technology.
Of course, much of that is ocean, which really means you only get around 24,000 square meters of land If you want to use the ocean's resources, you'll have to build suitable boats from the resources on the land. About a third of of that area, though, is practically devoid of easily-accessible resources since it's desert. That leaves only about 16,000 square meters of usable land with resources.
Do realize that's a square patch of land about 415 feet on each side. It's roughly double the area of a FIFA-sanctioned international match soccer field, and that is your whole fair share of non-desert land.
Looking toward your "healthcare" need, you only have about 2000 square meters of arable land, most of which overlaps your 5000 square meters of grassland.
For illustration, that's a square patch 146 feet on each side. 1.6 times the size of an Olympic swimming pool, and that's going to feed you (fairly) for your whole life. If you need to grow raw materials for your medicinal needs, that will come out of your food supply. If your "leisure society" includes grilling a steak in the summer, you're going to have to devote quite a lot of your farmland to raising your bovine recreation.
Fortunately, we have an economy to make life easier. Your yearly fair share in that economy is $10,610 worth of production, to meet the current average world lifestyle. If we consider all labor to be equally valuable, you need to produce enough from your 71,538 square meters to sell for $10,610. That sale can take many forms, like selling off your ocean wholesale to a fisherman in exchange for a share of his income. You can turn around and use that income to buy tools from the guy who built a metalwork shop, and now you can farm more efficiently. Producing $10,000 isn't that much effort.
However, you're probably a member of the rich Western society, making over $30,000 per year, so it's not unreasonable to consider that the lifestyle you're used to is about three times as rich as the world average. If we merely distribute everything evenly to "all", then everyone's living in the same wretched state, at $10,610 gross income per year.
Let's consider, then, what it would take to bring everyone's standard of living up to a rich American level... perhaps at the equivalent of a $60,000 salary. That means that every person's average production must increase by 500%, without using any additional resources. That means farmland efficiency must rise dramatically, resource recycling must become the norm, and absolutely everything must be done as quickly as possible to meet the demands of such a lavish lifestyle.
We don't have the technology for that. We still need to make major advances in agriculture, genetic engineering, materials, and automation to hit that improvement goal. Some aspects are within reach, but at the same time we're depleting resources faster than we can replenish or recover them, and the world population is always increasing. In many ways, having the resources to give everyone a leisure society is as much of a dream as giving everyone a magical castle.
But that makes no sense, we'll live on Mars, that makes sense.
Both plans seem to me to be equally absurd, as they both require advances in several fields that we simply can't approach yet. Ultimately, the hope is that Mars will provide more resources on its own, and the effort to go to Mars will inspire new technologies to help achieve the efficiency goals we want here on Earth. You and I share the same Utopian dream, but with different routes to get there.
* Some disclaimers apply to my math: I'm not particularly concerned with precision, since every figure used is an estimate. My methodology is to find the most reliable sources for figures that I can, and apply them in interesting ways. Your mileage may vary, void where prohibited, and so on and so forth, et cetera.