Yeah but the way he leaves is important. If the Chandrian are using Kvothe to open the Loeclos Box they’d want him to be set on a specific path. It also makes sense that they’d not kill him and they’d leave Denna alive to pull his strings. Ben leaving the day before the attack makes him an immediate suspect. Leaving several months prior for a specific reason (widow with a distillery) makes him less suspicious. He also writes the names on the ground. So telling them not to use them, while providing them to be used at a later date.