Once you learn what it is, it’s hard to condone.
I feel the same about tail and ear docking, though with certain dogs (boxers I hear get repeated tail injuries) it seems there are still some legit reasons.
If want a cat, it’s going to scratch, it’s their nature. Why would you want a cat if you don’t like basic cat behavior?
Same as bird clipping. It’s a bird, I understand that there are some risks for flying animals, but why would you want a bird in the first place if you are going to cut its main mobility tool. Would you amputate one of your newborn’s legs so it has less risk of wandering around and being hit by a car?
Yes, depending on the species they will molt 1-2x a year and the new feathers will be fine.