Exactly my opinion. They have had DECADES to get 2D the way it is now, with screenwriters, actors, directors, cameramen - just everyone, really - familiar with how a scene made it into a movie. In contrast, 3D has only been with us a couple of years, it's simply too new to be used effectively so it tends to sway between accidentally good use and overkill to show off 3D.
It's actually identical to when stereo was introduced to the music scene. The first few recordings had no sound stage, they had a LEFT and a RIGHT (an example is how "Play that funky music" starts, by Wild Cherry). It took years before we moved to a soundscape where instruments and singers were more distributed. I see 3D follow more or less the same path.
Incidentally, what amuses me is that everyone overlooks the biggest change to film theaters since the introduction of sound to movies, which was driven by 3D but had been brewing for a loooong time: moving to electronic film projection. When you watch a 3D movie, you're actually looking at the output of what you could call a massive LightPro, hooked up to a fat hard disk. There has never been less of a technical reason not to launch a movie in many countries at once..
To me, that was a bigger revolution than moving to 3D because that has been tried so often in the past that I thought they'd given up on it..