In general do not override / overpower automatic systems
In general do not override / overpower automatic systems when there is an option to disengage via another mechanism.
Depending on the systems design / certification, overriding / overpowering can result in in some serious even hazardous situations. Older auto-throttles which interface with hydro mechanical fuel controls via 'fuel trim' systems may result in full travel trim and inadvertent over speeding /over temp or sub idle / shutdown. Slip clutches may provide some protection but in doing so can be damaged which in subsequent operation fail to work correctly.
Most modern autopilots guard against overpowering with force/displacement cut outs which minimise out of trim forces. Older autopilots may not, overriding these might result in a large opposing trim movement such that the resulting stick force cannot be managed – several upset accident reports.
Modern auto flight systems may have related characteristics, but without the force-feedback due to auto-trim follow up or similar. Remember that if you override the controls it may affect trim, trim is a control, and is very powerful.
You would not expect the PNF to ‘help’ the PF by overriding the control (except the trainers); the fate is coarse words or a ‘clip round the ears’. An autopilot/trim is much stronger and less forgiving of such assistance; you don’t train the auto system by overriding it, it’s more likely to train you not to do it again.
If you are going to put your hands on the thrust lever/controls to override, then why not press the adjacent disengage switch – they were designed with the human in mind.
But not all designs cope with the mind of the human.