I mean, the answer could be that you do that three times, then you remember that the emergency AD said that you should trip STAB TRIM CUTOUT when this happens,

I mean, the answer could be that you do that three times, then you remember that the emergency AD said that you should trip STAB TRIM CUTOUT when this happens, so you do, and then you realize that you're mistrimmed at less than 1000ft AGL, you just disabled the motor that was allowing you to fix the trim, and now you can't fix it without losing 600ft in the process while you release the yoke. I am not saying this is likely to be what happened! But given that Boeing didn't even mention any of this in the manual before Lion Air, it seems plausible that they either didn't test it carefully, or tested it at high altitude and imagined that it would never happen at low altitude?