[ehnto]

No you are assuming I am against space exploration, I am not. I didn't create that dichotomy, the OP was suggesting earth is no longer suitable. To me at least they were implying colonization is our way forward. If anything my reply was more in line with what you are suggesting, fix our planet with what we have around us. Maybe that includes mining asteroids, space based research, maybe even power generation or transfer, living quarters supplied by the earth.

What I was saying was more of a challenge to our competence, if we can't pull off making earth work, with it's vast resources, and existing infrastructure, how could we move from earth in a meaningful way?

One example, OP suggests we have no room. We have heaps of room, it's just not arible or hospitable. Guess where else isn't arable or hospitable? Every other planet in our solar system! So they gave up on earth in their mind, in favour of somewhere even less hospitable