Picking just a couple points of your post, the animals soak on their own choice.
Still doesn't change the fact that there are animals with continual shed problems that owners continue to soak and continue to have problems.
This makes me wonder if maybe those animals are not producing the needed oils due to some other continual problems with husbandry?
I was one that did bathe my first ball not knowing any different. Dry broken sheds tell me there was a problem doing this.
I posted a video of my yellow belly shedding while I was weighing him. A fresh shed skin has a really weird oil/slime feel to it.
My observations are my own.