I think it's true both ways:
A lot of people assume it's like finance money, but it's not.
And on the flip side there's a lot of people coming from normal company or startup land, and assume that the $400k + average performing L5 is a myth, when that's pretty typical for big tech.
And I definitely agree with sibling here: $300k or $400k is good money, but in a place where the median house costs $1.5 million or something insane like the parts of the bay area that have a <45 minute commute, it doesn't go as far as you'd think. And it's incredibly risky, because now you're tied to always getting that level of comp for decades or you'll get evicted. (And while $400k + L5 Meta comp may be typical at Meta, it's not exactly trivial to maintain, or nearly as relaxing as a software gig you can do at other companies)