In a game of poker, the unknown is your most valuable asset. The opponents do not know your hand, whether good or bad. You can bluff, feign uncertainty, and mislead your onlookers; as long as you can sell it.
When things feel unsure in the workplace, there being more questions than clarity, the natural posture is to hold your cards close. Whether you have a play or not, the appearance of an ace in the hole is comforting enough.
The problem: An organization full of poker players breeds deceit and gossip. Only open hands with every card laid bare can produce clarity and honest direction. Yes, revealing your cards will put you at risk, but without risk there is no trust.