This has been my experience as well, same for Amazon.

I didn't practice that much since I hate wasting time on useless tasks, and the interviewer literally told me to just leetcode and read the interview book. I asked him a bunch of web questions and he had no fucking clue, all he did was leetcode and interview every year.

you're forgetting that it's leetcode pulling their problems from the companies' question pool, not the other way around.

It doesn't matter. At the end of the day, all leetcode "style" questions fall into a particular bucket. Two pointers, graphs, etc. It's not like the company is innovating new types of problems. It's just the same problem reworded.