I guess I'm most strongly motivated by providing assistance and resources to people who want to learn, so whatever happens with the people who don't want to learn doesn't bother me that much. I'll enforce whatever rules I have to, to the extent the institution provides me a means to do so (and requires me to), but it just isn't a big motivator for me.

I would prefer the proportion of students who are there to learn to be higher (it'd be a more enjoyable and motivating environment), but I don't think being more of a hardass on cheating is going to solve that problem. It's probably true that there are students who, while tempted to cheat, would be great students if they were scared away from that temptation by vigorous enforcement. My guess is that number is fairly small, though.

I think most of the people who cheat are the kind of student who doesn't really want to be in this major at all, but feels they need to get this degree to get a job. I think vigorous enforcement with those students, even if it successfully stamps out cheating, will just result in a bunch of students grudgingly doing the work because they now have no choice. But that kind of student still isn't that fun to teach, so my motivation to expend more effort than I have to on converting "cheaters" into "grudging teeth-gritters" is pretty low.