The fact that people think promoting depopulation is extreme is part of the problem. There is obviously a limit to the population we can reasonably support (we call this carrying capacity in biology) and whether you think it’s now or later, at some point we have to stop growing the population. Unlimited population growth is literally impossible.

Edit:

The idea that we’ll have more if there are fewer people serves only those who already have the most.

And this is the opposite of true. The oligarchs want more bodies to feed the pyramid scheme that is capitalism.