The fact that most people don't shut up and multiply is something I would regard as more of their problem than a problem with EUT.

I didn't say that we shouldn't have a utility function, I said we don't. Our actual preferences are incompletely defined, inconsistent, and generally a mess. I suspect this is true even for most LWers, and I'm pretty much certain it's true for almost all people, and (in so far as it's meaningful) for the human race as a whole.