It's not about the food. It's about a place to rest their fat bodies. Lacking the agility of every other bird, they prefer strictly horizontal branches of a certain diameter. There is plenty of other trees around. They could just realize the particular ones in front of my window mean getting shot with stuff. Honestly, they could alternatively just contain themselves and not literally shit my plants kaputt. We could coexist.

Do you commonly see other birds disfigured because they kept ignoring deterrents? No?! That's because pigeons are fucking stupid.