A lot of FAANG programmers are people who "work to live". Even with the financial means, the freedom to do what they want isn't necessarily something they value very heavily. Instead, it's a steady 9 to 5 and they have time for family, friends, and hobbies, and they're content with that.
Also important to note though: while FAANG pays well, it doesn't pay so well that you can consistently retire at 35 unless you pay very close attention to your wealth management.
If I had financial independence, I'd try to become a teacher. Unfortunately, even fully vested, I'm a good ways out from financial independence.