[fa3556]

Tweaks are divided into essential and advanced. The essential ones shouldn't have any negative impact on the system. They also document the changes each tweak makes (so you can undo them): https://winutil.christitus.com/dev/.

[keyringlight]

I think the issue is a bit out of the author's control, where tools like this are word of mouth advertised as 'one simple trick' by geeks to a broad audience to fix what they see as wrong with windows. People love convenience and adding "oh by the way, make sure you read/understand the docs first" rarely happens. I think it's part of the move for computing to being appliances that ongoing maintenance isn't seen as needed