In my humble opinion, many instances of ‘writer’s block’ are in fact ADHD or autistic burnout. Writing as a job is more forgiving of neurodivergence than most, so many writers are basically subsisting on caffeine and anxiety until they hit a brick wall and their executive function collapses
Which would mean that reading up on neurodivergent burnout is more likely to help get over a writer’s block than the fluff you find in books or blogs on creativity