Nudity is a simple concept until it became possible to see one naked with clothes on; it's a word invented before this was possible.
As recently as a few weeks ago I showed a person how much could actually been seen on these and they had no idea the level of detail. And even a guy at work recently when I told him these were being removed he didn't even realize he'd been in one.
I'm confident that if people were more aware of what they were the outcry would have been much stronger. Unfortunately, the apathy of the most rules, as always.