Big Red Rat teaches hands off at V1 to prevent accidental thrust lever reduction. Not for mythical reasons. Red Rat shorthaul even teach keeping hands off thrust when getting airborne - no sure why that is (apparently due to 737s autothrottles and servo reliability?)
I think good airmanship is to keep hands away at V1 - hence the discussion of thrust hold etc. After all if you suddenly need you hand back on the thrust how long does it take? 1 second?