my understanding is that, all other factors being equal, the better shape you are in, the more likely you are to sweat.
My commute starts hitting hills right when I get warmed up, so I do slow down. Since I live in an area that can be hot and muggy, I think avoiding sweat is pretty much impossible for some months of the year.

I also prefer to wear cycle specific clothing while on the bike, and I don't apologize for that.