Look at what we did to the planet with the current (and smaller) population sizes. You think adding MORE people isn’t going to become an issue?

We are, in the near future, going to have a mass migration of people away from no longer inhabitable land.

Those people you’re talking about aren’t going to give up power and let “average people” right the ship. And those same “average people” have been placated and conditioned to buy shiny trinkets and celebrate touchdowns and home runs instead of organizing and uprooting the real problem makers.

By just about every measure? Would you rather have a smaller population and the same standard of living, or a larger population and a considerably lower standard of living? The earth's resources and abilities to heal itself are finite. The more people we have, the more restrictive our quality of life needs to be. Instead of having a house on some usable land, a garden, and some chickens, you're forced into a stacked box, with one window, and no yard, surrounded by other stacked boxes. Plus the impact of everything you do is magnified. Oh, you want to drive to the store? Better walk 20 blocks instead, because we're already at our carbon capacity. That last example was hyperbole, but it's not that far fetched. Basically a lower population gives us a lot more leeway to live our lives comfortably.

By what measure?

Literally every objective measure of our planet's health? We are permanently changing the atmosphere, simultaneously causing a mass extinction event, and virtually every environmental preserve and tourist attraction is facing huge damage from overuse.

Every human being has a carbon cost, none of us are carbon negative or neutral, until we build systems that change that, every extra human we add is destroying our planet faster.

...should we eat them?

There's also the fact that heavily developed nations with declining birth rates are also overwhelmingly responsible for climate change.