I agree that everyone has good intentions, but at the end of the day these interviews can be gamed really easily.

Before interviewing at Google I spent ~3 weeks doing leetcode style problems on a whiteboard I bought just for this purpose. Did not make me any better as a SWE, but definitely helped me clear my interviews. Without the practice I would have failed my interviews.

Having said that, I don't think I have any better alternatives; any interview process is ultimately going to be game-able in some manner.