Yes, it is irrelevant. Are we going to say Gobert is an all time great shooter because he has an all time great TS%? It's not that hard to determine how good a shooter is. It's efficiency and context. That's it. One without the other is not very meaningful.
I don't even care at this point. If you want to stand by this stupid logic, I can't change your opinion. Royce O'Neale is a better shooter than Dame and Gobert is an all time great shooter. That is your logic when you completely disregard context. Die on that hill if you want to.