Comment Re:2 different things (Score 1) 95
The answer is quite simple: human experience. And, not having all our eggs in the same basket.
As for the first part: you can look at wonderful pictures of Saturn or Jupiter, as taken by Hubble, JWST or one of the probes that went there. You can also look at these planets, using your own eyes, through a telescope. Pictures are nice, but that live view is something totally different. Same if you look at a cloud cover from above vs. the pictures you can get from a drone. Space exploration goes far beyond pretty views, obviously.
For the second part: of course we're, for now, still far away from being able to survive off Earth without resupply. But we really should work on that, if we want to have a future. If only because we know for a fact that Earth will become unlivable - maybe not through our own foolish actions, but latest when the sun has burnt enough of its hydrogen and starts changing its structure. I know long-term planning isn't everybody's thing, but there are people thinking that far ahead.