It wasn't necessary to know MCAS existed - the procedure for runaway trim is in the manual and is the correct response to MCAS failure as MCAS failure exhibits itself as runaway trim.
> superhuman ability to stay airborne.
Turning off the stab trim with the cutoff switches is part of the memory procedure to deal with runaway trim, and no superhuman abilities are required. Just remembering to do it.
> You are avoiding
Not at all. I just take issue with the claim that pilots had no role in the accidents, and take issue with the bad design of the MCAS software being a cost saving measure.
Note that the fix is redesigning the MCAS software.