Sorry but the whole point is if he cared he wouldn't want to remove a ban that exists wholly to protect children. Simple. His child's life is not threatened by eating nuts or never seeing another nut again.

Would you wear perfume/aftershave if visiting a friend with severe allergy to either?

Would you buy a kitten as a present for a person with an allergy to cats?

Would you suggest bee keeping as a good hobby to someone allergic to their stings?

Would you plan an evening of oysters and champagne for a loved one allergic to shellfish/seafood?

Of course you wouldn't, instead you would think of their needs before your own. You can cope quite adequately forsaking all of the above while in their company. Or would you stammp up and down saying " I love cats and you must too."