Additionally, if there was no fastpass, it's not like FP users would stop riding. They'd get in line, and they'd still be in line ahead of you. The only difference is now everyone is spending all their time in line instead of off doing other things.
.... Disney has said on the record that their own research shows this to be true.
You just made my point for me. If everyone stood in one line, would it not move faster at 100% standby and prevent one person from standing in two lines(one virtual, one standby)? Do you have the Disney research link that shows that lines are shorter. I know math was not my strong suit in college but my simple math tells me Fastpass makes the standby line way longer than it should be.