Interesting...

Just one quibble: “other than pure aesthetics (“I just like it”) ... which are idiosyncratic (i.e. not true for most people)” sounds like a overwhelming exception to me. Given that I've never met anyone trying to convince other people to become vegetarians (though I've read a couple such people), I guess that's by far the most common reason. (I've eaten meat in front of at least a dozen different vegetarians from at least four different countries, and none of them seemed to be bothered by that.)