[argonaut]

Yeah. Having done a few PM interviews, to an engineer like myself they do seem very very subjective and personal. Because there is no right answer, it seems to me you have to say things that the interviewer thinks is thoughtful (subjective), or reason about things in a framework that the interviewer likes, or otherwise share their opinions. Which is a huge enabler of hiring people the interviewer likes.

At least in engineering there is a right answer. I've never been rejected from an engineering position where I aced all the questions with clean code, and designed all the systems robustly (of course, this is rare, it's when you don't get everything correct that the subjective judgment in engineering interviews comes into play).