I know that tongue-in-cheek snark can be difficult to detect for many people, but consider the context here: I responded to somebody who said that success is 75% luck. There is no amount of hustle that would let a person become a railroad mogul, an oil baron, an automotive pioneer, a sugar plantation owner, or a privateer today. Being born into the correct historical era to become one of those things is part of that luck. And my secondary implication is mocking the idea that many of those people achieved their success by working hard, or even working at all.