If people are willing to wait for it, let them. Many visitors are coming to the park specifically to experience BaTM. Giving them the option to go through a long wait to ride it is far better than giving them no option at all if they are in the unlucky group that can't secure a time. Not to mention, the app isn't reliable enough to properly handle an experience with this much demand.
I'm grateful to know I will be able to ride Ministry at least once on my trip.