Between them FAMG employ hundreds of thousands of engineers, they're always hiring more, and within them comp in excess of $500k isn't rare (it's certainly not the median, but I suspect it's below the top quartile), hence my assertion that $200k can certainly be a stepping stone, if you're willing to put up with the BigCo open offices, reorgs, politics, etc. You seemed to be arguing that those tradeoffs aren't worth it as the $200k is very unlikely to translate into much more. I'm arguing the likelihood is higher than you were giving credit for, but perhaps we weight the concrete value of FAMG equity comp differently.
This suggests an interesting asymmetry that could make a lot of people very wealthy. Either they don't want it, they aren't skilled enough for it, they've found another way to achieve it, they don't believe it, or our recruiting sucks.
there are literally thousands of technology companies you have never, ever, ever heard of, in the < $100 million revenue range. those are run by smart technical people who do not play nicely with others (i.e. wouldn't last an HOUR at google, even if they COULD get through the interview, which many couldn't, because FAMG interviewing process sucks), but are competent and rich.
who do you think is buying all your cloud computing services?
the vast majority of people do not get that kind of stock, the ones who are conned into over-working for their low-six figure jobs (you clearly do not suffer from this, and have avoided being dumb with your time and compensation).
unless i am mis-reading your post.