That's true about making pedal turns to the right, they use less power, but require power to stop the turn, so if you make a left pedal turn, you won't find yourself in a situation where you'll be unable to stop it, the torque of the main rotor will do that for you.
Additionally, if you make the pedal turns to the left in the R22 if you happen to smack into anything, it won't be tail rotor first and you might have a chance to come away from it without losing the tailrotor.
"They" sometimes hide things from us. We should not trust them, the only reliable information we can trust is our own wits.
Who's they?