The problem isn't purely solvable by the number of rockets we can produce. Mars is wildly inhospitable with the majority of the soil being poisoned by perchlora

The problem isn't purely solvable by the number of rockets we can produce. Mars is wildly inhospitable with the majority of the soil being poisoned by perchlorates, it's a convenient source of oxygen but it also means the soil needs to be processed before we could even start to use it as a substrate for crops. Fundamentally the issue with long term Mars habitation is that any technology that allows us to live on Mars full time without support from Earth would make even the wildest 'destroyed' Earths livable. The only thing Mars gives you is there's not going to be people beating on the outside of your trillion dollar dome trying to get in.