Yep, so he assembled the words and typed typed the thing in twenty nights...and for him, that may well have been easy. But he had been "writing" it for many years. And THAT was, I'll bet, not easy. We sometimes forget that there is craft and labor in authoring that only requires some drive and discipline. The "worth" of it is drawn from exceptional...even superhuman, effort and endurings.
The Art of it happens against the odds and in spite of everything else.
We all are allowed, as individuals, to decide what is and is-not Art.
Its a big responsibility. Use it wisely.