I suspect that writer's block afflicts mainly people who have some stable and ample source of income outside of writing. So far it hasn't been a problem. ↗
A book is one kind of an art form and a film is a different art form. I think as a writer you just have to say, well the book is one thing, and the film is a completely different one. ↗
It's always a nice feeling, having people think that you feel things much deeper than you're allowed to say, but this isn't true. If you want to find out what a writer or a cartoonist really feels, look at his work. That's enough. ↗