Hollywood takes children's books and programs, and makes 'social justice' and environmental extremist movies from them, not the other way around. It's not just Children's books either. Anyone with enough drive can make a book or music. The 'book and music' industry is not dependant on big studios run by uber-liberals.
Hollywood is just a propaganda arm of the DemocRAT party, and those who pay into it, will get more of it.
Film is an adaptive medium and always has been so that’s not a just comparison. There are all sorts of films being made by people with same ‘drive’ and financed from various sources.