I've got a girl that I bet no matter how you go in, if your hand is in front of her it is going to come out with the snake attached. She was probably about 15 years old and she was kept in a front opening cage before I got her with the same attitude.
On the flip side of that, all of my animals somewhere over a hundred at this moment are kept in top opening cages. None, but these three bite. And nothing I have raised bites.
Conditioning matters. Doesn't matter what style cage. If the animal feels safe it is not going to strike unless u happen to be holding a rat. Even then, except for babies that get confused will differentiate between a hand and a rat.
Breeders need racks. Front opening cages are time consuming to clean and take up more space then racks. If someone has display animals then great, use whatever works. They do not work for me and I do not have issues.
Snakes along with almost every other kind of animal have issues with change. Take a look at craig's posts on the subject.
I am glad that you have never met a ball with a true attitude problem. They are rare, but they do exist and I have found that the older they are the less chance of fixing it you have. If you were on this side of the pond I would send you my demon child. I'm sure she would be well taken care of but I think she might change your mind about a couple things.
And BTW, thanks for the interaction, it has been a little too quiet around here lately.