No from the 2010-2022 period, this wasnt the case. You could find a ton of very high paying roles, or atleast get interviews for them. There is a serious vibe shift. Also, 500k isnt that senior
You've defined the market as four companies (FAANG - 1) and roles representing <1% of their highest performers. Yes, they have roles and maybe even openings, but no reason to think there would be an immediate match for anyone but a superstar.