Your comment is supremely fallacious. You've made the following two incorrect assumptions, among others:
1) The only things down/uploaded through torrents are unauthorised copies of copyrighted works.
Wrong - torrents are a primary distribution source for large files of all natures - latest Linux ISOs, freely-available video and audio content, open-source binaries.
There are also a few companies using torrents to distribute their copyrighted works, with users purchasing the licence and activating it separately.
2) Torrents are the only high-bandwidth consumers.
How about the BBC iPlayer? YouTube?
There's quite a few very high-bandwidth consumers out there.
Peer-to-peer transfer makes economic sense for many large-sized transfers, as it saves huge amounts on hosting costs.