This is has been Tort's MO with offensive first players, did it to St Louis in TB, Atkinson in CBJ, now Frost in Philly. He doesn't want them to curtail offense, or even stop taking chances, he wants them to be engaged without the puck.
TK is Torts perfect offensive forward, always moving, making things happen without the puck, not the highest IQ and sometimes you can see Torts roll his eyes, Tippett is becoming a similar player.
Scorers at lower levels tend to play a lot of minutes and learn to glide through shifts, Torts attitude is if you're tired you don't glide, you skip a shift. He'd rather put a less talented player out there going full speed than have a scorer half ass his back check.