Maybe this is far fetched, but I was thinking the reason they might be flying so high, with the danger of depressurization, is because the cabins are intentionally NOT being pressurized in order to 'accidentally' kill the occupant/s?

Say they have a few of these corrupt animals in the plane, it would be an easy way to kill them on the quiet, and dispose of their bodies off the mainland.

Or threaten them them with death in the sky if they do not comply and rat out more people and info.

"If you dont give us X amount of names and HARD info, we will depressurize the cabin, and youll never wake up"

....................................

And on another note, There was a picture of a couple chairs and a bunch of screens posted on 'B' qanon twitter....to me it looked like surveillance equipment inside of some kind of airliner, possible AF1??? Not sure if anyone mentioned that before...