A dietary restriction is being allergic to peanuts or intolerant to gluten or lactose. Completely different to these knobs.
You seem to have missed the words "absurdly picky" in my post.
And actually no, if I were taking a casserole or similar instead of plastic tat to new parents I'd want to know it was something they would enjoy or if they had religious/ethical restrictions not just allergies.
Don't knock the concept until you have tried it. The concept is great, its not rendered stupid because one couple is absurdly picky. In particular its helpful to people who don't have the extensive storage and freezer capacities apparently available to all of MN "in their day".