Have we? I can't think of any previous development that threatened pretty much every form of employment available.

Sure, computers removed a lot of jobs, but they also created a whole new class of them (the ones most people on this site have).

AI will remove that entire class of jobs, too, with nothing new to replace it. For a while, there'll be new opportunities for AI research, but if they actually succeed at improving AI, they'll eventually make themselves redundant, too.