Just to add my opinion on the matter, I believe strongly that every gecko needs a humid hide, not just for shedding, but for good health all around.
As background, I am a new member here and have had my leo, Goldie, for almost one year. A few months after I got her, she went off food and has refused everything offered to her. She never lost any weight (very interesting IMO) but I was constantly worried about her and tried many things to help her to start eating properly, including vet care and assist feeding.
Enter the GU forums. I realized that the care I was providing was not the best that it could be (goodbye 10 gallon tank with poor temperature gradient and hardly any space for the proper amount of hides). I had just started gathering the supplies to make her a better home, and the first thing I set up was a new humid hide. I decided to add it into her existing cage to see if it would help at all, but I had tried so many things that had not worked, so I did not have much hope. Well, as soon as I put it in the cage, she climbed into it, chilled out in there for a few hours, came out and started hunting mealworms for the first time in what seemed like forever! Since then she has started eating crickets again and is finally on her way back to good health :banana:. I never imagined that a simple container with moist coco fiber in it would make such a difference. She is more alert and lively than she has been in 8 months. I am astonished at the literal overnight change, and I now know that I will always keep a good humid hide in any leopard gecko cage I care for.
I cannot imagine what those poor leos go through without any humidity whatsoever unless the owner happens to notice they have had a bad shed and toss in a wet paper towel. I wonder if it affects their eating habits or if that was just my girl.
I also think that it is an important thing to remember to clean out the humid hide weekly. With it being moist and warm all the time, it would be a breeding ground for bacteria if left for a longer period of time. I can't imagine that that is good for pets or for humans.
Overall, I am going to "risk" having a humid hide in the tank as it has turned my gecko's health around completely. Just my humble opinion.
Note: I had a humid hide in her tank previously but it had vermiculite in it and never held humidity very well. Also, she actually did not like being in there when it was wet, only when it was dry. I switched to the coco fiber and it holds moisture amazingly well and it doesn't repel my girl like the vermiculite humid hide did.