Our typical schedule is get up early, take a break in the afternoon, and then come back in the evening. EMH makes it work for us. It also takes away our manic need to do things during normal hours, like Toy Story Mania, Soarin, Test Track, etc. With EMH, you can squeeze in the e-tickets without blowing your FastPass+ choices or standing in line for an hour.
Imagine how awful the waits would be for the big attractions if people like me weren't satisfying our e-ticket fixes during EMHs. EMH allows us to relax during the busiest times, getting us out of the lines for the e-ticket rides, or even getting us out of the parks altogether to allow the "amateurs" to have freer rein.