Disney doesn't "sometimes" offer more hours in summer, June specifically; in the past 12 years (which is simply as far back as I cared to keep scrolling historical calendars) they have been open later than 10pm every single day 100% of the time.
It is quite reasonable to do some research when you're planning a vacation. In order to get the best choices of resort, or restaurant, or add-on tours, or possibly to take advantage of discounts, you have to book a certain amount of time in advance. To say nothing of the time needed to save up and the family's excitement over the chosen destination. If you're researching Disney, you'll find many guide books, blogs, forums and historical information all pointing to the fact that Disney almost always extends hours AND that they have almost always done at least some of that before this relatively late hour. It makes perfect sense for a person to believe the hours would be different that 10pm and to be frustrated that they can't finalize plans yet at this point.
After planning vacation time, paying deposits, booking airfare, and making many reservations, "just don't go" is not a practical solution for most travelers. I don't see how pointing this out can be considered whining (specifically in my case, I haven't traveled in June in a long time and am not going this June. I can hardly be accused of stomping my feet because something is troubling me personally).
Best of luck WDW travelers of summer '16!! I hope your hours get extended, and hope it happens soon!