If he shows up some day in a particularly foolish mood, you are free to either ignore him or to take advantage of him, but it will be disastrous if you fall under his influence. Indeed, if you aren’t certain that you understand and can value your business far better than Mr. Market, you don’t belong in the game.
Makes me think of all the CEOs who are firing and slowing down market acquisition atm just because of "market conditions", even though they should presumably know their company better than the market does. Either they all think their companies are scams or they don't know their companies enough to say and convince their investors otherwise.