Stucchio thinks that front-running people is fine in circumstances where it's not prohibited by law. It's legal, therefore morally right, is his argument. This

Stucchio thinks that front-running people is fine in circumstances where it's not prohibited by law. It's legal, therefore morally right, is his argument. This is completely not the argument presented in the OP. "Front-running" is fine because it leads to quicker inclusion of market information in price and makes large players pay for their own large trades.