We will have no choice eventually.
What problems could we solve if we doubled the scientists and engineers working on it?
Plus every new birth is a lottery ticket for our civilization getting the next Einstein.
But I don't trust humans to make such collective sacrifices willingly. We're just too lazy, stupid, and selfish.
I think the more likely outcome is that reality will control our population for us, via drought, famine, war, and epidemic.
The US's total CO2 emissions have been going down for a decade or two now, even after population growth. And no, it's not because we outsourced them.
There will probably be some places with "natural" population control from lack of food or from disease bht that doesn't mean "we" have to do anything.
You def can't be pro-choice or anti-fascist then support population control.