You could walk out of the house tomorrow and be struck by lightning, so why put any effort into budgeting and saving for the future? That's terrible logic bro.
You're right, the way we're going, humanity will have to reach outside of Earth to sustain ourselves, but we're not really able to do that yet. It will take time for that to become a viable option for humanity's survival. If we've destroyed ourselves because of conflicts over dwindling/monopolized resources or turned our planet into a wasteland before we've actually reached a level where resourcing in space is a reasonable option, we're fucked.
And, we absolutely could survive for another few thousand years with a smaller population and more responsible stewardship of what we have on the planet. Civilization has been around for 6000 years and modern humans have been here for 300K years. It's ridiculous to act like it would be impossible for us to exist here for another 3 or so milennia without having to go to space for sustainment.
First, I'm not even going to get into the ethical issues with what you are proposing, because if we do put rules on how fast the population grows and how resources get divided, then the main question is who should be allowed to make the decisions on the whos, the whats, and the logistics, and holy fuck no group should ever be given the power to make those decisions and rules. That aside though.
Just start with your first sentence and forget about everything else. No one said dont plan for the future. The idea behind farming asteroids is for the future.
You are going into theories of what humanity can do if they werent human. Humanity can achieve much more if we didnt grow so fast and were all philosophical and did the right thing. Cool stuff man. But lets forget about focusing on the impossible.
Forget about humans even. Just look at life. Life at its core grows and expands. All forms of life. Humans included. And then look at what makes human progression possible, which is inate greed and competition.
So sure, humanity can achieve everything your saying in a perfect world where we all cared about our neighbor more than ourselves and none of us were greedy and none of us competed.
Unfortunately that will never happen. It goes against the inate characteristics of whats makes life, life.
So when we take our rose colored glasses off and look and reality, we get to the point again that unless humanity starts getting resources from outside the Earth, we wont survive as a speicies.
And so, worrying about resources on Earth is pointless because if we dont find a way to get off Earth in the next few hundred years, it wont matter anyway.
I like what you are saying btw. I wish we can live in that type of world too. But its not realisitic. The practical thing to do is continue working towards farming resources we need from space, and then colonize other planets.
Likely we destroy ourselves before we get there. Theres a reason why intelligent life isnt found. The theory is that life gets to where humanity is at now and destroys itself before finally expanding out of the planet we started in.
