"it is a reflection of the fundamental reality that the supply of content (and increasingly goods) is infinite, and thus worthless"
No, the supply of worthless content is infinite. The supply of interesting content provided by professionals with the backgrounds necessary to provide such content is not. This is why you still see the majority of journalistic content provided by a small number of organizations, with the rest simply aggregating that content. Facebook, Google, etc. actually produce very little cultural value on their own. Their entire existence is predicated on co-opting the content of others for free and using it to make money. It's a heck of a business model, if you can get away with it, but let's stop pretending that good content just appears out of thin air...