One; that was not the previous discussion between myself and the other fellow.

Two; isolated cities in caped craters or tented canyons would totally give us room to make habitable for scientists workers and tourists.

Three: your first sentence is a little jumbled, Not unless we don't want to stay human- is what I think you may have meant.

Four: we cannot easily predict where ai assisted science will do for us. Maybe we will find a way to live on mars with better medicines involving new proteins and enzymes folded by nano-materials thought of by very powerful machines.