FCOM and FCTM have to cover a wide scope of circumstances and scenarios. It is clearly mentioned that it would be impossible to cover everything every time.
The Autothrottle is NOT a component required for Dispatch. Therefore, for maneuvers such as Takeoff or Go Around we are required to " verify " that enough thrust has been set, either manually or by the ATS.
On the Human Factors side of things, have we sometimes hit TOGA when the intention was to disengage the AP ? or disconnect the ATS when we wanted to select some other mode ?
A number of times, in the simulator, I observed guys with a " heavy hand ", that is, preventing the ATS from selecting the required thrust, even with the noisy clutches saying " let me move !!! "