I'd overall suggest stepping away from the idea that growth is so one-dimensional that you can "win" at it. But even if it were, there's plenty of room within them to grow, and just getting in is far from "you've achieved it all"

If we stay with that idea for a second: FAANG companies have tens of thousands of engineers. Getting there isn't a "gold medal". You're barely in the stadium. If you made it to Principal Engineer, congrats, you've gotten through the qualifying rounds. Still plenty of room to strive.

There are plenty of valid reasons for why you choose or don't choose FAANG. But "Where would I go once I've achieved that" really shouldn't hold you back.