Agreed but i feel at least in scrum theory it is encouraged to have a T of skills with deep knowledge about your speciality and shallow but for basic stuff sufficient knowledge in the rest of skills in the stack. So i think it is known that full stack doesn't mean master of everything. But yeah it's impossible to master everything. My skill gets smaller the further i stay from the frontend. Like I can get backend tasks done but tell me to write a plsql package and I'm gonna have to learn a lot of new shit