But they wouldn't maximise short term profits that way, would they.
The park is there to make money, not give high levels of consumer satisfaction to every customer as best as they possibly can.
School trip season is still limited to a single month in each year, the parks maximise profit, it is nothing new at all, it happens every year.
Profits must be made to balance out the quiet days.
Schools have options to spread their own peak demand out through visiting in other periods, they choose not to.
All parks have been very busy at this time of year for decades, only social media has changed.