Sounds to me like muscle-ing up makes the barrel turn?
We are talking about applying torque to the handle through the hands. It makes sense that the hands would create resistance and not be all floppy and just along for the ride.
I wouldn't refer to it as "muscling up", but there needs to be a certain amount of tension. Floppy wrists would lead to poor control, in my opinion. It's a matter of finding the right balance.