Much like all the "picky eater" threads, people will get hugely insulting either way here.
In general, I think if eating matters to you, you can't imagine what it's like not to care - food is such a big deal and a communal experience and a big part of life.
And if it doesn't, you can't imagine caring in the slightest about what anyone else eats or doesn't. (I'm in this category myself.)
I do think you could miss out on an amazing relationship in every other way just by judging diet, which seems mad to me.