It's related to survivorship bias or whichever; successful writers have written for years already, but you / the potential writer only discover these when they're already established. Few people will actually have followed them as they progressed through the years.

Anyway, point is, you read a good post whose goodness was in part due to the thousand posts before it, then think "I need to be as good as this" and you'll fail. I'm sure there's a word for that too.