That is true, but they also provide http and ftp, and sometimes rsync - not just because it is often more reliable, but because not everyone can use a torrent.
In some areas I have lived, if you use torrents, your ISP will begin to throttle your connection or fine you for the additional bandwidth used. Also, you'll be besieged by additional connections for weeks to come from people trying to attach to you, even after you've stopped seeding. In short, it's just not the best solution for many folks, myself included. With my current connection, which is over a 4G connection, I simply cannot participate due to ISP blocking any torrent type connections (using filters.) It is possible at the network level, via snooping, to determine if a torrent (or torrent-like sharing program) is being used. Yes, this also has caused some friends of mine to be very upset because Blizzard and other companies often distribute their game updates via a torrent-like mechanism.
That's why I'm willing to put them into standard http or ftp storage, but not torrents. Someone could, of course, make a torrent that references the http or ftp archive. But I wouldn't be able to participate in that.