I mean, there’s an infrastructure problem that’s worth considering. With low enough population density, it could become no longer feasible or worth it to maintain large-scale, country/globe spanning infrastructure projects such as power grids or undersea fiber optic networks. This infrastructure didn’t matter much a few thousand years ago, but it’s pretty critical now, so the same rules don’t necessarily apply.

I don’t know how likely I consider this outcome to actually be, as you’d need a very steep decline, but it’s at least worth keeping in mind.

Obviously. The point the person was making was to say that even if we buy into the bullshit narrative that this was consensual, it still doesn’t make sense. They didn’t use incorrect terms to skirt around it, they were making a specific point about their claims.