One thing is a 'fact,' though. Leaving one's feet and leaping in the air make it more difficult to maintain fundamentals in the throwing motion. That's why coaches teach good solid footwork as a basis of good passing.
However, and this is a big one, some players are better able to maintain good throwing mechanics than others, including when jumping in the air. It's not just about arm strength, though I'm sure that contibutes to it, it's about still being able to throw an accurate, catchable ball while doing so. Russ can do that, apparently, while TJ struggled with it. Basically, fans, and I believe most coaches, will frown on jump passes because of the fact that perhaps most QBs can't do it well. Most coaches probably won't teach or allow practice of the move because of that. So, like was said above, hatred of the move translates into hatred of the QB doing it based more on whether he can do it successfully.
Talent can get you to the playoffs.
It takes character to win when you get there.
SUPER BOWL XLVIII CHAMPIONS