Your analogy can extend to the fact that a car's engine can be put in the front, amidships, or the rear of the car, or can be transversely placed, or can have anywhere from 2 to 12 cylinders, or can have carburetors or fuel injectors, or can be air- or liquid-cooled... and so on. They don't know where to put the engine! They don't know how many cylinders to use! They don't know how to get gas into the engine! They don't know how to cool the engine! What a joke! Not ready for prime time!
Why did we move from carburetors to fuel injectors? Why did we mount engines in different places? Why are cars liquid-cooled now, instead of air-cooled (unless you have an old Microbus or a motorcycle)? Because someone thought of something that could improve the technology. The fact that someone realized there could be a better way to do something does not mean that solar isn't ready for prime time. It means that new thinking led to an improvement in the application. It happens all the time with all kinds of mature technology. It's called "progress".
If you were to look back at how cars progressed, there would be lots of instances in which one technology was replaced with another that was far superior. With the advantage of hindsight, you could look at people who used the old tech and say "Boy, were they stupid", but you'd be wrong. They were using what was available at the moment, until someone figured out a better way to do it. So, you could look at south-facing placement as stupid, if you wanted to grind that particular axe. Sure, when you look at new ways to configure the arrays, you can say "They don't know what they're doing", but what they're doing has been common wisdom in solar applications for decades. Someone looked at that in the context of residential energy usage patterns and utility rate schedules, and figured out a better way to do it. Huzzah! Seems obvious in hindsight, of course, as do many things when a new technique or technology reaches the common consciousness.
If we were to compare solar to automobile technology, it's probably at the "Model T" mass-production consumer-consumption stage at the moment. Compared to modern cars, the Model T is hopelessly outdated, because new thinking led to improvements. Ford had his detractors too, and history made fools of them. I think history has its sights trained on you and those who think as you do. When was the last time you developed a solution to a problem instead of bitching about those who are trying to do the same? Maybe if you did that, you'd find the billion dollar idea that cuts our conventionally-generated electricity usage in half at a price point that made it viable. Or maybe not. In any event, condemning people who are developing solar tech as stupid is by far not the most useful thing you could do.
Or are you one of those neanderthals that "rolls coal" and tries to run bicyclists off the road?