That's the obvious answer, but there has to be more to it than that. Because any decent player will realize that he doesn't have a hand every time they are in a pot. And being a tight player, they aren't going to be throwing a lot of money into a pot without a strong hand or strong draw. So trying to bluff people out of ever pot, you are either going to run into a monster or win a small pot. Plus there are many more bad loose players than bad tight players, IMO.