Okie Dokie RunnerFool...I'll bite...
You're spot in regard to Walt Disney wanting families to enjoy their time at his park. He made sure that unique opportunities for enjoyment existed by hiring the best and the brightest, whom he then constantly forced to new heights, outdoing themselves over and over again with the highest quality creations.
So then, what's wrong with this? Just a couple quick things...
As you mentioned, they slapped a cardboard cutout in the window and called it a day. Nobody ever confused a cardboard cutout with new creative heights. Ever. In the history of ever. So that's problem one - it simply isn't up to any kind of creative standard, let alone the Disney standard.
Second and final point, some things deserve a bit of respect. From everything I've read over the years, Walt didn't have any too many sacred cows, so under his watch that plane may have never been parked there in the first place. Of course he didn't make that decision, but the people who did brought it in with fanfare and respect at the time. As a fan of all things Disney, it's a neat thing don't you think? Imagine the stories that plane could tell. So problem two would be what many here on the board, including myself, obviously perceive as a slight to the respect previously shown. To boil it down, in my tiny uninformed opinion, if you're cool with this, you'd be cool with slapping "I'm with the band" shirts on the AA's at Hall of Presidents. I mean, kids might like it right? To quote another famous Disney speaker, "Same kind of thing, different name."
Anyhow, apologies that we ruffled your feathers. To each their own and so forth. Still love going to the parks. Doesn't mean you have to like everything they do.
Think I'll go have a delicious PB&J sammich...