> For a long time now, NASA rockets have been designed for space exploration purposes, not military purposes.
Doesn't matter. Those space exploration rockets aren't helping us to address a single pressing or practical problem here on Earth, and they won't in the foreseeable future either.
> Once we had relatively efficient ways to put objects into the orbit of our choice, we found more and more applications.
Putting Earth-serving and Earth-observing objects in orbit is great. But that's not space exploration. Sending probes beyond Earth, if it's not for detection of Earth-threatening objects, is of no use to us now nor will it be in the foreseeable future.
> We developed capabilities for scientific purposes, and these capabilities proved to be very useful in everyday life.
In fact none have, with respect to space exploration.
> If we hadn't indulged in space exploration, we wouldn't have had the ready-made ability to put up GPS satellites once we could build them.
Nonsense. All we needed for GPS were military rockets -- the same kind used to launch spy satellites.
> We've also learned a whole lot scientifically ...
Nothing that we really needed to know now. None of it has helped us to address a single pressing or practical problem here on Earth, and none will do so in the foreseeable future either.
> What you are saying is that past space exploration efforts were good because you can see good results from them, and the current ones are wasteful since you lack imagination.
Incorrect. NO space exploration has been good. Again, space exploration means the exploration of space objects. The only exploration that mattered was the detection of Earth-threatening objects.
> There's no difference between gravitational waves and lasers as you explain them. Both were theorized and apparatus constructed.
That's correct. But the second was inherently useful due to its confirmation of properties of matter which we could exploit. The first is not such a device.
> The big difference is that lasers were created long enough ago that we've found very large numbers of useful purposes.
Incorrect. Lasers were known by scientists immediately to be useful and to provide promising capabilities. That's not the case with gravity wave detectors.
> There's no difference between gravitational wave detectors and Leyden jars as you describe. Neither was useful for any practical purpose.
Again incorrect. You don't seem to be reading my comments completely, so you're making me repeat them. Gravitational waves detectors detect things we cannot manipulate nor exploit for our benefit. Leyden jars did the opposite -- immediately.
> Both demonstrated properties of matter here on Earth.
Inaccurate. Gravity wave detectors demonstrate properties of matter here on Earth that we cannot exploit. Gravity is the weakest force in the universe.
> Scientists working on electricity early on didn't know that they could manipulate and exploit it for anything useful.
Incorrect. It was clear by making sparks that they could easily control something new. They could see that *immediately*. Sparks could start fires. They could make a frog's legs jump -- helping to understand physiology -- even pertaining to the human body. Gravity wave detectors cannot do any such thing.
> The big difference is that the Leyden jar era of electricity was a long time ago, and we've had lots of time to develop uses.
Incorrect. The uses for Leyden jars were immediate. Learn your history.