I wouldn't draw the line at "community", I'd draw it at "identity". It's one thing to be something, for example, I'm a picky eater, it's another to build your existence around that fact. Being a picky eater is not part of my identity, it doesn't define who I am, it's part of who I am, surely, and I wholeheartedly accept it, but if I woke up one day and craved some cauliflowers I would still be me.

I could be a part of some picky eater community, I guess, but I would quickly grow uncomfortable with it if it revolved around cherishing and celebrating how we are picky eaters.

I think at some point we took a wrong turn in the identity-based paradigm of society we now find ourselves into, and in our zeal to achieve self-acceptance, empathy and compassion we went from "you don't have to be defined by things you don't want to be defined by" to "you are defined by these and that's great". Everybody is free to base their identity around whatever they want of course, but I can hardly think of anything more dull than basing your being around some mental quirk.