I think the "you" here is both the customer, and the reasonable person who thinks you should make money buy selling the best product for the best price possible

I think the "you" here is both the customer, and the reasonable person who thinks you should make money buy selling the best product for the best price possible. Beats has more money than you (probably) and me (definitely), and for some people, that's what's important. Not the "how" or "why" or "should", but "can".