Sure, make the trim wheel clack, and in this case it's going to do all it's clacking during that 1min continuous stall warning. They didn't hear that, why would they hear the trim clack ?
I think you lumping all the crew together... a few of us here (maybe a lot) are pretty sure that PNF was heads down while some of this was going on and not aware of long term NU inputs, or position of THS. Clacking may well have garnered his attention to NU trim and thus validity of SW... so yes, I anyway, disagree with you.
But as RRR suggested, a stick shaker and even subsequently a pusher may have been the only way with
that crew on
that night, in
that aircraft