Why does everyone want to “get food” as a first date

(24F) It’s so awkward to be like “hey so um actually I have 30+ food allergies and I have been out to a restaurant in over 2 years” when they ask to go out. I know most people are understanding but sometimes I feel like it’s a dealbreaker. So many people see going out to eat as a bonding experience and I can’t help but feel like they’d be missing out if they became invested in me