There's not really a definitive answer to that question. As with most other technical variables, how important 60fps is depends on the person you're asking. Some people put a tremendous amount of value in specifics at the cost of everything else, while others prefer various different balance combinations. In general though i'd say that most people have a preference, but the absence of it doesn't stop them enjoy a game (e.g. good IQ and a stable 30fps tend to be my preferences for a console game, but the lack of both didn't stop TLOU being my favorite game in 2013).
As for why PC gamers are more likely to 'bash' 30fps, that's because a) it's a platform that naturally attracts those that are more likely to prefer 60fps over 30fps in general, and b) to many 30fps feels worse on PC that it does on consoles (which compounds the previous general preference). It's worth noting though that those that actively go around mocking console games for being 30fps (in earnest) tend to be part of a minority.
