The passionate online responses were, to my thinking, a little over the top. Reading a book is not the same as being sold into slavery. Learning a new way to think about your creative projects doesn’t mean you must recant all your previous ideas.
Maybe a couple short stories:
There once was a man whose only tool was a hammer. To him everything looked like a nail. (that was a really short story, eh?)
There once was a property owner who hired the man with the hammer to build her a house. It didn’t turn out so good. Her neighbor engaged a contractor who promised a wonderful house – cathedral ceilings, bay windows, spacious closets. She didn’t know her contractor believed time spent mastering his tools would stifle his creative vision. That house turned out worse.