<Insert here 476 examples of how something else you are using somewhere in your life that appears inefficient and wasteful>
Your point is made. And mine is look around. Society and humanity and commerce and capitalism. That's where we are today. Just let business A buy a product produced by business B. All actions and agreements by all parties are legal and voluntary. Does anyone need another bitcoin mining farm? Probably not, but they want to make money. Does anyone need $3000 Luis Vuitton bags? Most certainly not but LVMH wants to make money. Most everything exists because someone somewhere has a self interest in making or doing it.
"It is not from the benevolence of the butcher, the brewer, or the baker that we expect our dinner, but from their regard to their own interest." - Adam Smith