If you want to get top dollar at a FAANG you will need to go through these type of system design interviews. You could say you shouldn’t work for a FAANG which is fair, but FAANG pays top dollar.
So if you're after the FAANG money, you have to play the FAANG interview game. If you're unwilling to play the FAANG interview game, then maybe you shouldn't be pursuing FAANG money.
Doing FAANG interviews is a necessary, but not sufficient condition to getting a FAANG salary. As others have said, non-FAANGs are trying to do FAANG interviews, and I would tell them to pound sand.