It is annoying. I'm like a lot of people here where I can be in and out of some parks by noon and ready to hop.
But I also understand the reason why they do it, which is so people don't get around the limits on sold out parks. Theoretically you could tap into AK at 8 am and be in MK by 9 for opening, which almost nullifies the reservation system for people with parkhoppers or APs. I don't think it's about driving up profits by making people buy more tickets or add more days, it's about crowd control and staffing.