We have the surface area for the next generation, but since unconstrained life grows exponentially, it runs out within a few generations. Isn't some kind of homeostasis preferable to repeated booms and busts?
If unconstrained life grows exponentially why is it every developed country is having a birthrate crisis? It seems most populations tend to naturally stabilize once parents realize they don't need to have like 7 kids hoping 2 or 3 survive childhood.