Yes, because if you're not helping on defense without the puck, you're basically useless for half the time you're on the ice (since most of the team you possess the puck little more than 50%, even if you're good at puck possession).
Torts has said Frost is on the ice to generate offense, not be a forechecker, but when the other team has the puck, he doesn't want him cherry picking or skating at half speed to conserve energy until they get the puck back. Get back in position and stick check to break up plays.
Makes sense to me.