Young Pyo is a lot of things... "tactical" isn't one of them. If he actually was, the Yoo men would've been dead ages ago. Also, you have to remember how deep the trauma runs for him. He grew up watching his dad being a sad, defeated sack of shit who did nothing but lay on the floor in front of the TV while Sun-young tried to keep things afloat. That's why he acted like a hot-headed idiot and tried to simply drag his dad away from the church thus making them all wary of him.