The data is so much more easily shareable compared to HTTP because all you need is a computer and an network connection. No need for a public IP address.
Where are the Googles or the Yahoos that harvest this data and make it easily accessible? If these companies made fortunes off the data that we put on HTTP sites (along with all the hurdles that populating a site with data comes with) then imagine how much more potential there is in the BitTorrent market where one can for instance very easily share any kind of info (albeit they must be online at first).
Sure now the network is populated by illegal movies and such. But if we populate it with blogs, recipe sites, documentations, videos, etc. a new kind of web can reborn that is more under our control.