I hear you and I think it would be great to have a truly allergen free grocery store, ! I have no idea how that would work, but it would be awesome. Grocery stores already run on very tight profit margins, so I can see why a store would hesitate to take a risk like catering one specific people group (even though, yes, it's a pretty large group).
Have you found any online stores that meet some of your needs? I know that's not what you are talking about, nor is online shopping a solution to all problems (like needing to pop in to the store on the way home from work to pick up a couple of ingredients for dinner), but do any online spaces help fill in some of the gaps for you?
Still, I do think a store like you described would be pretty great!
Best, Erin, Team Member.