I don't see the problem. You bought the product, you're allowed to download it in perpetuity, even if it's from a torrent site.
Hell, the law is on my side. Depending on where you live, there are laws which allow you to make copies of media you own for personal use.
You can use a VCR to record broadcast TV, I don't see why you wouldn't be able to make a copy of stuff that's available on streaming sites, etc. Especially if you bought it.