As far as "normalization of nudity" goes, I don't think that is the case. The TV shows you mention blur out breasts and the pubic area. This would not be the case in many other parts of the would. Also it is done now on nature shows that would have showed them in the past. I can't think of one off hand, but a little while a go I saw an old documentary that had them covered over while I remembered seeing the same show years ago without the cover up.
This post is directed to "ncouple".