[aleph_minus_one]

> I don't get why students don't come to office hours - hardly anyone ever does.

Honest answer from my student time: because as a student you are/were learning and solving exercise sheets nearly all the time. Thus you typically didn't have time to come to the office hours.

Before you are able to ask questions about lecture topics, you better first understand where your understanding problem is and which questions you actually have to ask. This requires quite some time that you typically don't have - because of learning of solving exercise sheets.