Writer's block was 'invented' in the 1940s. Before that, not only wasn't there a word for it, it hardly existed. The reason: writing wasn't a high stakes venture. Writing was a hobby, it was something you did in your spare time, without expecting a big advance of a spot on the best seller list.
Now, of course, we're all writers. We put our ideas into words with tens or thousands of people, for all time, online. Our words are spread.
With the stakes higher than ever, so is our fear.
Consider the alternative to writers block: the drip. A post, day after day, week after week, 400 times a year, 4000 times a decade. When you commit to writing regularly, the stakes for each thing you write go down.
You don't launch a popular blog, you build one.
The writing isn't the hard part, it's the commitment.