I feel you are spot on with your second last paragraph. I have similar experiences (although not at FAANG). That appears to be the invisible/"in the background" culture in star-studded teams/companies lately.
But ultimately, only you can know who you are, what you are capable of, what you want to be capable of and what you need to get to that next level.
There was a reason you considered/interviewed FAANG. If that reason is more important to you over $, real-world learning, skills, and abilities, you know what the answer is.
As a seasoned software engineer and someone with a special knack for deep and hidden problems, bottlenecks, and other "elephant in the room"s, I best work with startups and companies who are serious about what they do, have been around for a while, are stuck and/or could use some soul-searching/clarity in their code, processes, people et al for the better and looking to truly make it in the LONG RUN. No, I am not a manager or a consultant. Thank you for reading.