“The treatment of writing problems offers a special challenge for clinical psychologists. In few other domains do patients pressure themselves to be so spontaneous, original and perfect.”
Those are the first two sentences from a psychology paper on writer’s block and the generation of creative ideas, by Robert Boice, published in 1983  If I were to write a paper on those subjects, I’d probably start like Harry Frankfurt in his book On Bullshit, with something like:
One of the most salient features of the writer’s subculture is that there is so much bullshit.
This is uniquely relevant to the problem of writer’s block too, of course.