[kaitai]

I think it's the implicit judgment that is more powerful. If you were to declare, "I'm a summer; I can't ever wear yellow!" no one would care. When you refuse someone's bread, though, that's a different question. Food has historically been a way to bond, in some particularly ritualistic ways. (We "break bread together", history has people eating from the same dish to symbolically and practically show trust, etc.)

Much of the current GF stuff is not that good, whether you're looking at environment, cost, culinary quality, or health benefits. Why eat a bar of tapioca starch? It tastes terrible. And my delicious almond-flour brownies are destroying the aquifers of California even though they give me a delightful 300+ calories per serving. On the other hand, the proliferation of GF goods allows people with real problems to sit down with family and friend and eat crappy sandwiches together without anyone feeling judged by the presence of a lettuce wrap, and that has its own benefits. Irrational, or not? Yes.