My point is that we might not solve those problems even if all resources are directed there. It makes sense to hedge because our survival is too important to ri

My point is that we might not solve those problems even if all resources are directed there. It makes sense to hedge because our survival is too important to risk with 'all our eggs in one basket'. You bring up fair questions, but questions that are likely to always be there and never answered. At the end of the day, if we become extinct, all these questions are superfluous anyway. Space exploration is, quite literally, a moon shot. But it's one that could give us the space (pun intended) to keep trying to solving the rest of the issues.