While overall I agree with you, I can say for a fact that attendance has not been following models from previous years. It is unpredictable and it is down, despite the image Iger is trying to project. My parents are both CMs. Their hours are down, and they have been sent home early a lot this year. There have been many days when MK has been dead when it should've been busy based on previous years. Dad was even sent home early on the 4th of July. The anticipated crowd just wasn't there. To the average guest coming in, the parks still seem busy, and they legitimately have been busy at times, but CMs have noticed the downturn. Heck, to boost attendance, all blackout dates were lifted on the maingates and CMs were recently given extra comp tickets above what they normally get. Those tickets expire soon. They were only good for a period when wdw is usually hopping. Even room discounts were increased. All this all of a sudden coming from a company that has continually stripped away employee perks over the last few years.
I don't think it's right to expect the amount of planning from guests so far in advance if park schedules can't also be set in stone as well. But I sympathize with the fact that they really can't anticipate demand right now as well as they used to.