There doesn't have to be any meaningful analogy here. Laws don't have to treat humans and machines equally. Laws are for people and allow things that are less than ideal, but necessary for people to function.

Humans can't leave their old brains at their previous employer, can't delete their experience learned on proprietary data. It wouldn't make sense for the law to fight this.

But the law can control what can be done with information stored outside of your brain.