Originally Posted by
Semreh
It doesn't help that STS operates by executing uncommanded stabiliser movements, so pilots regard that as normal operations. Seeing and hearing the trim wheels move is normal flight deck background, which is part of the reason why MCAS was so insidious.
This fact has been ignored for too long.
737 pilots have been trained, by constant repetition, to ignore relatively short, uncommanded (by either the pilot or the autopilot) trim inputs.