I don't know of a single crash cause by a pilot having her hand on them after takeoff. If it has never caused an incident or accident, on what would you base your opinion that it is dangerous?
I don't know of a single crash of an airliner with FADEC/EEC and autothrottles caused by a pilot NOT having her hand on the thrust levers after takeoff. If it has never caused an incident or accident, on what would you base your opinion that it is dangerous?
Turbulence COULD cause the pilot to inadvertently retard the thrust levers.