Following this logic to its conclusion, there is no such thing as control and all laws are pointless. You can't force people not to kill each other, but you can enforce punishments that dissuade people from doing it (and in some countries create regulations to make it harder to acquire tools to do said killing). Same thing goes for stealing, perjury, fraud, assault, breach of contract, defamation, etc.

I actually cannot think of a single instance where someone has "control" over something and the law exists purely as a way of exercising that control, and I can think of hundreds of examples where laws exist to stop people from doing things they may be physically capable of doing but would produce a negative effect on society if permitted. Maybe there is such an example, but it'd be an outlier.