Yeah... I specifically prefaced the comment with "most people in these conversations are talking about families" and specified in tech.
Even if it's just for a few years, the amount of money you can save up by living in these high COL cities is insane (for tech workers at least)
Honestly, part of it is I don't know how long that's going to be true. If we have a sudden tech bust, I'd rather be sitting on a large amount of savings and trying to find work anywhere it pops up than on a smaller amount that won't sustain me if I have to move to a high CoL area
[0] https://www.quora.com/What-percentage-of-people-become-paren...