I think that you are grossly overestimating how many rides DAS users go on. Sure, some of the fakers are probably going on more, but most of the legitimate users have to use that down time for their personal needs. And popular rides are popular for EVERYONE, not just those without disabilities.

It comes down to a person can only be physically in one place at a time. Someone having a DAS return time is the same as someone having a Genie+ return time. It means nothing to those who are in that line while others are virtually waiting for their time. It doesn't "add to capacity" because they are not physically in that line yet.