It's what worked for me, and the consequences of when my friend did not do it. When your a breeder you don't HANDLE each and every snake every day, on top of which feeding in the enclosure causes territorial habits. I just explained what worked with me and what didn't work for my friend, I fully support the method and I'd prefer not to have fingers pointed at me as if to say I'm wrong. People do stuff different ways, because I own them as pets and I prefer to have a controlled environment for my pets, I do it my way and I say what I do and do not support and why.
I'm sure as a breeder you don't particularly worry about this problem, but that's not going to change my opinions or stop me from doing it. So don't point fingers at me saying "You're wrong" when I like what I do and I think I have reasonable reason to do them.