Pulling shed off question

[MyKuLoO]

I recently started doing research on HOTs and as such I've watched a lot of videos on people that keep these. I noticed that when one of their snakes has an incomplete shed the keeper would rub and pull the unshed skin off. It was very aggressive and something that I never thought was acceptable.

I know this doesn't relate directly to jungle carpet pythons but it's the only snake I have right now so I guess for me it applies.

Mine has never had issues with shed so far and I wouldn't even consider doing what i've seen done in those videos.

The keeper was very experienced (35+ years) and obviously he had done it before.

Is this only something done with venomous snakes because the typical "keep in a moist pillowcase" method is not practical for venomous snakes?