No, that's still ignorant of ecological processes, I think. We need to adapt culturally/economically.

What do you think happens, if we continue as we do, but assume "infinte" ressourses? You would still exhaust regenerative/reparative capacities, accumulate chemical byproducts and waste - shift balances. See nitrification of water bodies.

The core problem is our lazyness to recapture uncompressed former dense resources; to operate closed cycle.

And well, I have my doubts we can establish the extend of space exploitation to meet our current e.g. global phosphorus needs within the next 30 years. Is phosphate rock even plenty around in asteroids?

Really, the only option? You must be joking.