I'd say it's more "learning to live within the means of a non-FAANG person."
My FAANG colleagues spending 4x what I was on their mortgages in the Bay Area were also technically living within their means, but it also meant they had no choice but to stay handcuffed.
That is the problem. It is about how much you are keeping after taxes. If >75 of that is going to bills, mortgages, cars and the stock drops, then you are essentially keeping far less and you'll find yourself stuck in your job.
Now that AI is everywhere, the loss of their job means a ~5 month runway (If on H-1B you have 2 months) is the reason why folks in the Bay Area at FAANG are terrified of leaving their jobs and find themselves handcuffed.