As you say it's the culture of investment banking, Big Law, and some other subsets of certain industries. Those subsets pay extremely well but things like weekend work are just part of the package.

I'm not at all convinced AI is going to radically change the culture of most industries in the relatively near term. There have been enormous changes to the tooling for all kinds of tech over the past few decades and I don't really see big changes to the work culture--other than the pay for software development at "tech" companies often increasing relative to other types of engineering. (It's not clear to me that sort of differential is sustainable.)