Add on to that. The last festival ends June 1st. Without festival stuff to keep people busy, EPCOT would be dead with no SE, all the construction already taking place, and the fact that historically summer is Epcot's lowest season crowd wise because of the lack of festivals.
Crowds would congregate in small pockets of the park driving up lines and creating bottle necks and leaving food lines miles long OR it would be an utter ghost town. We've already seen a dip in EPCOT crowds these last few weeks with the current level of construction plus having had Test Track down (yes its now reopened but) and that was even DURING a festival.
I'm just saying. Disney would run into big problems on one end of the spectrum or the other.
If you look at the historic touring plans crowd calendar for the last few weeks, every park except Epcot has been 9-10 every day. Where Epcot has been 5-8.
So that illustrates your point.
though careful what you wish for. Epcot has been the only park with manageable lines.