wing clipping

I know there are like a thousand topics on this but I want to ask on my specific case. I adopted an ex-feral pigeon a couple of days ago. He suffered from PMV and had a broken wing. An awesome person rescued him and cured him. This pigeon never had the opportunity to fly like a normal bird...

My friend purchased a African Grey parrot, the breeder insisted on the wings being clipped. It seems clipping wings on parrots is pretty standard. Many breeders of ornamental ducks also suggest clipping wings on breeds that fly. Why is it so taboo to clip wings on pigeons that are aviery birds...

In about a month, I am going to release two of the three feral pigeons I have been looking after for most of the year. the third has a spinal ( I think) injury and was rescued by another person and given to me. He didnt know what heppened to her. i think maybe a car hit. she can fly a little...