The main point here is _using_ copyrighted materials to create a commercial product, that you then sell, that may be used as alternative or substitute for the original materials. You’re missing that point and talking about two independent projects competing.
Because the competition is the only source of alleged harm, but people can do that even if they don't copy anything. There isn't actually a property right to the customers. You can lose sales to someone else whether they copied anything or not.
So what that you can loose sales even without crimes being committed? This somehow makes it okay to profit off someone’s work and ignore licenses?