> Just think what all the money spent by fantasists like Musk, Bezos, Gates etc on going to the Moon, Mars, or on equally useless and cliquey projects, could do for world health, welfare and peace if applied locally.
Not as much as you might think. Don't forget, there isn't any "money going into space", there is only a few lumps of (exquisitely crafted) metals, plastics etc.
All[1] of the money being spent is ending up, basically, giving people jobs - feeding, clothing, housing, improving physical and mental health, providing dignity[2]. Even if you don't believe that there are any other benefits, either short[3], medium[4] or long[5] term (or, for the hopelessly romantic/optimistic, the very long term[6]).
Go and have a look at the old idea of the Eccentric British Landowner, who spent their money on having Follies built: these provided the locals with work and wages. And all within The System, no need to try and Tear Down The Man[7], just that daft old buffer spending the family money on a pointless Summer House in the North Forty.
Yes, the modern lot could go about it with less of an eye on making a buck in return, and a healthy dose of humility (and "old bufferism") would go a long way to making them more palatable, but take what we can get.
[1] yes, yes, there are no doubt boondoggles and backhanders and all the rest, but so long as that also gets spent.
[2] even if current events puts paid to the idea that - certain people - actually have "giving people jobs" as one of their life goals, that is the (unintended) result.
[3] e.g. we may be pissed off at aspects of it, but satellite launch capability gives us Good Things, and the improvements in lift required for Moon/Mars/Manned missions can then be used for other things.
[4] There is no Planet B, but there are honking great lumps of rock out there, with our names on them; it would be nice to have a way to send up something big to give them a nudge
[5] materials science in space - along with all basic science - is valuable research, that all feeds back into the good of the human race (and other denizens of Earth).
[6] There is no Planet B, so there is merit in looking to settle the neighbourhood (Solar and stellar).