I think there is a disconnect in your logic.
Old ST fans who are more likely to have hated STID are not going to be the ones throwing money at J.J. Trek products and ticket sales. It isn't like when the next J.J. Trek comes out they are going to say, well, I was going to go see this turkey of a film, but since Simon Pegg is an ass there is no chance in hell I'm giving any of my money to him.