Do you realise what would happen if Amy chose the Doctor instead of Rory? River would never be born. As a result, River does not sacrifice herself to save the Library, and the 10th Doctor must sacrifice himself. And if he dies there, Donna can't become a meta-crisis Human/Time Lord and stop Davros' Reality Bomb, resulting in every single universe being destroyed in 2009. It also means Amy never met the Doctor. In other words, this shipping destroys all of time and space
Moffat, you are the best troll shipping has ever seen