Comment by bluescrn

It's absolutely the worst place to be in any sort of crisis though, whether it's war, pandemic, rioting, natural disaster.

So many people, potentially desparate people, concentrated in one place, utterly dependent on supplies being shipped in from elsewhere.

And we can't have everyone living ever-smaller lives in ever-more-dense cities anyway, as you need all the food production, manufacturing, energy production, and resource extraction to keep those cities alive. And for now, that still requires a lot of human labour (far too much of it overseas, given increasing geopolitical instability)