We should. Yet a significant portion of mental health issues would be solved if psychiatry provided mother as a service: Teach interpersonal skills and to take care of yourself. They don't teach that stuff in school and parenting is a hit-or-miss.
The world indeed is what it is and your diagnosis is spot on: Most people didn't become adults as defined by being able to make consistently good decisions without support. Can either let them hang themselves or infantilize just a bit to let most dodge the worst pitfalls.
Don't really have a strong personal opinion on where the pragmatic optimum is, but surely a long way before banning porn. Tangentially it'd be far more ideal if that pragmatic optimum could cater to the ideal adult without catastrophic social consequences, but that'd literally be a generational effort.