re: However many sensors there are, is really not the issue.
yes , it is. Only ONE sensor was used, unlike most(all ?) others where 3 are used. THAT is the crux of the problem. Relying on ONE and ONLY one sensor is NOT smart. It also didn't show up in the BOEING testing, nor the FAA, the simulations( which WOULD have shown this fault)
They grounded the fleet for what 2-3 years until a solution was found. Yup, they read SEVERAL sensors now...
Only two of those airplanes have ever crashed!
Both were flown by "camel drivers"
Many years ago I was in A USN transport squadron (reserve) with old C-54s
On the forward instrument panels was: FTFA, printed, in black grease pencil.
This was a reference to flying....... with the loss of an engine.
If the automatic crap does not work, the "camel drivers" will drive the airplane into the ground!
They simply cannot revert to: FTFA
They are taught to push buttons, and the lack basic thinking, adaptive, and flying skills.
It is both a training and a cultural issue!