There's a strong tendency among the generally-uninformed public to conflate "often done badly" with "can never be done well", and to proceed from there to "this is a dreadful thing we must ban". I am fundamentally against banning, ethically.

Specifically in the cases of many kinds of animals, it is hard (and in particular expensive) to do a good job, and a good job is a moving target, but when you say no one is allowed to do it, we end up losing the animals themselves.