> The point of parole should be to prevent future criminal acts.

I think you mean the point of enforcing the rules of and revoking parole is to prevent future crime? Sure. But parole, which is specifically something handed out for good behavior in prison and is in lieu of prison, is still better than prison. They are still serving a sentence, and it's not as bad as it would be in prison. There's lots of problems with how we treat felons and restrict their futures, but I do not consider strict parole rules part of that, given it's during the time allotted for their original sentence. Just because they are out of prison, doesn't mean their punishment is complete (in this case).

Put simply, in all cases I can think of, parole is better than prison, and that's what it should be compared to, because that's the other option (no parole). Comparing it to being completely free for the purpose of deciding whether it's fair is nonsensical to me.

Edit: s/Comparing it to not being/Comparing it to being/