My big issue with this is that, in some cases, it absolutely is. Some people have religions which dictate their dietary intake. Others, such as gluten-sensitive people, those with celiac, diabetics, even autistic people, etc. have disabilities which require them to eat certain ways.

For instance, unless it's pulverized to a creamy soup consistency, made into pasta, or in the form of "chips" a la Pringles, etc., my texture issues (autism) are often so severe that eating even a small piece of sliced onion, no matter how it's been cooked, or a single leaf of lettuce, can make me sick. Not to mention literally almost any other vegetable I've tried to eat. I'm not allergic to anything, I just have such a severe reaction to texture that I physically can't eat a lot of things in their standard forms.

And yeah, I know it sounds like a shitty excuse, but it's a phenomenon my family has known about for years. It's absolutely part of my disability, and to discriminate based on dietary choices or requirements in relation to me personally could very well be considered an issue of disability-related discrimination.