While I agree, renting access often comes with the trade-off of losing control of your content. Netflix's content licensing agreements are finite, and your favorite movie or show could be gone next week. When you own the files, you own them for however long you desire.
True, there are always tradeoffs. This particular tradeoff doesn't bother me because I can always get a copy of a particular file if I need to, e.g. if Netflix pulls down a show I like.