I think you make a good point. But here's my counterargument: if I buy someone a ticket to a concert, then are they bound to the terms I agreed, including in r

I think you make a good point. But here's my counterargument: if I buy someone a ticket to a concert, then are they bound to the terms I agreed, including in relation to harm to them caused by (alleged) supplier negligence? I'd argue that they have a claim in tort, not contract, and therefore the terms of my contract with the supplier are not relevant.