I can't document this, but supposedly a long time ago, when people used to listen to music by placing large needles on top of spinning disks and listen to the music come out of metal horns attached to the needles, some bright team invented the amplifier and loudspeaker and the first true Hi-Fi system was invented. However, they ran into a problem. When they played the system for a group of consumers (or whatever they were called back then) nobody liked the new, improved sound. Didn't sound a bit like the sound they were used to getting out of their 78's. There were low tones, high tones, dynamic range, it was too loud, all this stuff that they weren't used to and ithurt their ears.
So, I'm always glad the people are experimenting, and always glad to keep an open mind. Is some HDR over the top? Sure, just like anything else.
But really, the bottom line is: if you took a photo, and had a choice of blown out skies and black shadows, or a photo w/details in the sky or shadows, which one would you pick? If you'd rather have the details, then the fact that HDR is better is established, and we're just haggling over the details.