Totally agree with you - I kept thinking "where do you want these crowds to go to the bathroom unless you build these facilities?"
In my view, Yosemite was already too crowded to be enjoyable for more than a few hours in the 1980s when I first visited the park. Even in those days I was always glad to get out of there and head for the backcountry. Pretty place, but too many people for my taste. I am looking for a very different outdoor experience than the one you can have in that valley. The only good thing about the attraction the valley has is that it is a magnet for crowds that otherwise may flood the backcountry places I prefer.