Again, my point was that even if every exchange, in and of itself, is mutually beneficial, the overall society can still be unpleasant. But it should also be no

Again, my point was that even if every exchange, in and of itself, is mutually beneficial, the overall society can still be unpleasant. But it should also be noted that mutually beneficial exchanges do not prevent negative results even directly, but merely improve the outcomes for those who are agreeing to the transaction; two parties can agree to an exchange that leaves them both better off than they were before, but harms a third party. Which doesn't even bring up that these exchanges are based on perceived benefit...