This is why free transactions in a market economy make everyone wealthier.
PS: Please spare me a lecture about externalities. Formally, an externality exists when Bob's preferences are decreasing in Alice's consumption. Since economics does not place any restrictions on preferences other than being complete, non-satiated, and convex, they are a possibility. But, a society in which everyone is able to veto anyone's consumption on the basis of some externality is a nightmare (e.g., can't allow other people to eat meat, can't allow other people to have children, can't allow other people to enjoy the sunshine etc).
I'm not against your point of wealth creation, but externalities are real and do need to factor in. Individual veto isn't in play, but some sort of societally mandated rules-of-the-game are.
There is no "pure" water or "pure" air. The "right" amount depends on costs and benefits ... None of that can be looked up anywhere and people end up bargaining over them indirectly.
Particularly, they discovered an underserved market niche and found a way to satisfy people's desires in a cost efficient way.
They originally saved money by using a cardboard tray not a box, that had a paper sleeve over it to keep the pizza sanitary. They could get two pies in there for what it cost the bigger chains to deliver one.
The fact that one person doesn't see value in a good or have a willingness to pay the asking price doesn't mean nothing is created. There exceptions however, but by and large people are free to pay whatever price for whatever good. Canned fresh air, little caesar's, art etc.