When I worked as an aide to a quadraplegic, they were rabid about the laws requiring all buildings and public spaces to be accesible to people in wheelchairs. I asked them if they expected the national forests to be logged and paved, mountains to be leveled, and the oceans to be drained, and they got angry at me. However, I had a point. It was quite possible then (~30 years ago now) to make a wheelchair that wasn't restricted from mounting curbs, going up stairs, and traversing rough terrain. Simply adapting the chair to have tracks, like a military tank, and adding some hydraulics to raise and lower the seat and occupant (to better keep the center of gravity low, and clear obstructions) would turn every building into something handicapped accessible, and rather than remodeling the entire world so legless people could reach every part of it, remodeling the conveyances handicapped people used would make most of the world, including undeveloped rugged terrain, accessible.

He never did agree, even though I was trying to get him back into the woods to shoot and fish (he had been an avid outdoorsman before the accident) and was even devising specialty devices to allow him to hold a fishing rod (power assisted), and shoulder and shoot a rifle (lots of power assistance).

I reckon empowering people that have handicaps, such as allergies, to surmount those handicaps is a vastly better solution for them - and everyone else - than to grind down every impediment to suit the least competent conveyance they could be provided. Making the bespoke muffin was exactly the right solution you could provide, bringing them to the table with everyone else without eliminating the specific feature of the treat everyone else enjoyed that they couldn't.

Thanks!