It may not be an advantage in terms of riding the same ride but people using DAS don't have to wait in the actually line and are free to do something else during that time. That gives them the option, if capable, to experience exponentially more of the parks than those without it.
People need to stop trying to pretend DAS isn't a MASSIVE advantage over everyone else in the park except for the guided tours.
Also, before someone brings it up, we are all aware that not everyone uses it that way and of course not everyone, due to the nature of some disabilities, could even use it that way if they wanted. That isn't the point. It is being overused and abused so Disney is trying to fix it. I am sure they will need to tweak things, but I would be willing to bet that DAS as it was is never coming back.