Git does no such thing. Plain text files with free form merging capabilities somewhat solves the idea that you can merge things. But, to make that work, the heavy lifting has to be done by the users of the system.

So, sure, if you are saying "people trained to use git" there, I agree. And you wind up having all sorts of implicit rules and guidelines that you follow to make it more manageable.

This is a lot like saying roads have solved how to get people using dangerous equipment on a regular basis without killing everyone. Only true if you train the drivers on the rules of the road. And there are many rules that people wind up internalizing as they get older and more experienced.