To add to that: Stuff can often 'wait a little'. A moderator (often) has access to both an on-site (team) and general moderator chatroom where you can do anything from rubber-ducking, having your decision checked before doing anything (posting your thoughts on handling something without actually immediately doing it) or seeing if you can defend your decision to other site mods if it really, really needs quick action.
All in all, you'll never really 'be on your own for hours'...