I was going to say the same thing. Their scientific value as a primitive society preserved against all odds is something we will never see again. To destroy it on a whim would be akin to killing the last dodo for food.

Some type of hidden observation as in the movie Insurrection might be worthwhile though? Someone should ask the NSA, are they really comfortable with these people NOT being monitored constantly? They could be a terrorist threat?

Having the scientific value of their society trump the need of their people to have better health and livelihood seems a bit utilitarian to me.