Folks....
First, this person is late to the party -- it's a tired old fear that gets brought up as each new wave of writers/publishers/journalists stumble into the idea of self publishing and get all horrified when they realize that there is a huge pile of junk out there. And they panic or rend their garments in grief at how everybody will drown in garbage for a while.
And then they realize that the whole paradigm changed over a decade ago, and it doesn't matter, and they move on.
This is just an exact replay of what people said the first few years of the world wide web too.
"Oh, no! Anybody can publish a web page, including crooks and spammers and idiots. And all those people will crowd out the useful sites and the web will become useless and abandoned!"
And guess what?
Crooks and spammers and idiots have indeed run rampant on the web. If you go by the number/proportion of crap webpages out there on the internet (and I don't just mean bad or stupid ones, but computer generated random junk) it's WAY worse than the worst fears of those who cried about how bad it was going to be.
You really seriously have no idea how bad the crap is out there on the internet, or just how phenomenally much there is of it. You may think you know, but you don't. It's unimaginable, like the space between atoms or planets or stars.
And yet the internet has not faded and been abandoned as useless. It has blossomed. The very parts which are most flooded with junk are also the parts that we use most.
Camille
(Ah, and I see that Emily has now beat me to this point -- oh well, it cannot be overly emphasized.)