While I've certainly seen players say those things, and agree that increasing humility is a good corrective to that character flaw, that kind of public bragging

While I've certainly seen players say those things, and agree that increasing humility is a good corrective to that character flaw, that kind of public bragging isn't indicative of their self-evaluation, and I haven't seen that expert players necessarily stop that behavior or demonstrate that humility was the key to their skill mastery.