Sorry, I don't really know how to put it. Why do we find it so satisfying? (Maybe not everyone) Those pimple popper videos, extreme cleaning videos and my favourite are the teeth cleaning videos I can't even find any more. They were close ups of dentists removing build up from teeth. Chunks of hard stuff removed and hoovered away. I even found it satisfying when my kids got nits (I wasn't happy that they got them, and I had the strong urge to deal with them urgently and immediately), to comb them out and remove all the little eggs. It feels like something so primal. Same if any animals had fleas.
Some things do go too far. I once accidentally clicked on a video of a person having an abscess lanced on their back. It looked like mashed potato coming out. I had to click off.
Sorry, this might be too gross even for me. But why do we find it so satisfying?