What do you care more about? Money or purpose?
For some people, money is the only thing in their field of vision. For others, spending their lives making a positive impact carries more, and real, weight.
Speaking as someone who works for the public sector, making moderately good money and helping real people everyday, I can tell you that I'd much prefer that to working for FAANG. Actually, I wouldn't be caught dead working for Meta.
It depends on who you are and what you value.