andy103, attempts to get the human species as a whole to behave entirely rationally have thus far failed and seem doomed to failure for the forseeable future. If you're expecting that to change anytime soon, you're delusional, although I wish to heck that somehow that particular feat could be achieved in an ethically acceptable manner. Maybe it's a failure of my imagination, but I can't see how that could be achieved.
But that's not a good reason for us to not do anything else aside from trying to achieve that particular impossibility, as has been pointed out eloquently by others in this thread. As have the likely benefits from us getting out there , developing resources for use down here and establishing colonies, etc.
With regard to your claims about whether humans have been to the moon or not already, there appear to be only three options - you either understand science insufficiently to know what you are talking about, you are a delusional conspiracy theorist, or you are a troll. In the first instance, improving your science education will save yourself from embarrassing yourself in public like this in future. In the second, please go and seek the help you need, and if the third is correct, also please go seek the help you need.
Being an idealist is good - but you have to be a realistic in your approach to things. If my ideal world came to pass many here would probably deem it a Socialist Utopia - but human nature being what it is, I doubt that would ever be achievable (not least because my idea of a Utopia apparently fills some folk with horror), so rather than berate the bulk of humanity for not being as logical and cooperative as I'd like them to be, I instead applaud those doing worthy things and hope that, one way or another, it will lead to better things somewhere, somewhen, for at least some folk. That, at least, seems a realistically achievable goal.
Getting heavy industry out in space using resources mined off-planet could well help things down here quite a lot, and thus I applaud those working on getting us Out There in order to start doing those things rather than berating folk for not fulfilling my Utopian dreams. And it's not as if many people aren't doing their best to work on the very problems you mention as well. It isn't a one or the other situation, and denying ourselves the benefits of getting into space will not magically solve other problems. That's simply wishful thinking. Or trolling.