One of the crucial differences between blockchain and Git is that Git is fully subserviant to humans and anything can be undone by humans.

If your blockchain house title is stolen by a hacker, either the courts (rightfully) aren't going to put any significance on the state of the blockchain and are going to say "yeah, you still own your house" (in which case what was the point of using blockchain in the first place rather than a SQL database or some such where mistakes and problems and fraud can be undone without cryptographically-hard obstacles in the way) or if in this hypothetical the Libertarian dystopia has progressed to cartoonish extremes, you're just SOL and lost your house, which just isn't even remotely realistic.