Before the Tacoma City Council voted to ban cat declawing except when medically necessary, a leader said the time was right to "choose cats, not couches."
I mean, my comparison was more aimed towards the fact that they lose a shit ton of mobility for a reason that, if anything, shows your lack of ability to care for a bird. Also, while the feathers do indeed grow unlike human legs (and excluding prothesis), that doesn't mean the owners will stop clipping them, plus, depending on when they started doing it, the bird may not even know how to fly and may not do it even if they are fully grown unless taught.
Now that I think about it, it's probably more akin to breaking someone's legs, though without the pain (unless whoever makes the cut really botches it)