It used to be expensive to publish anything - especially the further back in time you go. So classics for example typically represent particularly bright writers, as having something published before the printing press, and widely disseminated, was simply unlikely to happen.
But today anyone can create an account on YouTube or stream on twitch and it doesn't matter if the content is of any particular quality or veracity, so long as the common man sees what he wants to see.
I think there's a major secondary effect, in that now that we are surrounded by low quality media, the average person's ability to recognize merit in general is lessened.