I share your criticism for poor interview practices. But not that basic knowledge whiteboard questions are asked -- sadly, it's a requirement -- rather that most don't get beyond that. Or dwell on the classic "OMG how could you not know this piece of trivia that we only learned here at our org after 12 years refining the solution".
Anyway I adore that kind of interview. It lets me know I don't want to work there! I call those interviews successful. Most candidates (or at least most discussion of interviews from the candidate POV) seem to think the entire purpose of an interview is to prostrate yourself to the all powerful company, that they may see you as worthy, oh master. It's the wrong perspective.
So while I share your criticism, I am not dismayed by it.
As someone of younger years (by SV standards), hearing the authenticity in this thread is refreshing. What path in the world of tech will put one around peers who intentionally focus on real impact on people and business?