Jesus I just watched ENT's "Dear Doctor" for the first time since it premiered and it made me sick. I've always liked the Prime Directive but applied in places like this and in TNG's "Homebound" it's a nightmare.
I wish Trek did an episode showing the downside of them actually helping either people. "Space Hitler" may arise one day from their planet? How is it less likely Space Hitler won't be overthrown one day by their planet?
It's one thing for thing to not interfere with a country/planet because you'll fuck things up or because it's none of your business, but it's also a thing to fuck things up by not interfering or pretending it's none of your business. The Prime Directive is supposed to be the product of a more sophisticated society, not a less one.