I think you're missing the forest for the trees here. The point of version control systems is to make developing software easier. It's a tool that exists for the convenience of its users. It's reasonable for people developing software to ask for the ability undo a change or restore a repository to the way it was a second ago. Telling a team of people using Git "it doesn't work like that" is unhelpful because it's not impossible for a version control system to work like that and the point of any software is to help them do what they're trying to do.

This doesn't mean that Git has to accept any feature under the sun and it might be that Git isn't most appropriate tool for teams that want such a feature. But there's nothing holy or fundamental about an implementation detail of how Git does things that makes their use-case hard.