I have a bit of a different opinion of the "little town" in Yosemite Valley and the crowds. As a rock climber, I appreciate the fact that I can bring in my car loaded with my stuff and park at pullouts to access the climbs. It would be more difficult if cars were not allowed. Granted, international climbers have no transportation in the Valley, but they usually get a ride with the numerous locals who do have cars.
As for crowds, I am glad that the general public has access to the spectacular scenery. I have seen many a baby pushed in a stroller up to the Vernal Falls bridge. My grandchildren have been some of these! Yosemite Valley is NOT a wilderness area. It is a PARK, for the public, and that means all kinds of "public". It should not be only for those of us "fit" enough to walk. On a whole, I enjoy the general public when I am walking the trails in Yosemite Valley. So many foreign countries represented and such a diversity of people. The cars do cause traffic jams. I have figured out how to avoid most. And I think the general public is figuring out that using the shuttle busses beat driving.
And yes, I avoid summer in the Valley, but that is more because of the heat and the fact that the high country is open. I love going to Yosemite in the winter.
And yes, I have speeded, but luckily have avoided tickets so far. Over the last 15 years they really have lowered the speed limit to almost ridiculous.