And most of Shakespeare is similar. The good guys and the bad guys are obvious just like in fables. But it's a hierarchy. It's useful to teach very young children fables even though they're silly. It's an easy way to introduce concepts around how we treat each other fairly. TNG and Shakespeare are the same way. Just a step on the hierarchy. Yes, as a person reaches adulthood, it's obvious that it's simplified. But you've at least seen examples in art of what might be worth aspiring to in life when young. It's why we've been telling each other hero's journey stories since Homer. What are the alternatives? Examples of self-interest and power grabs with no consequences? To a young person that can be rapidly demoralizing.
Totally agree on the 45 minute window limitation though. That's why I've always liked DS9 where they took what could have been one episode about a culture and conflict and made it 7 seasons.