MCAS wouldn't have been required if they retrained pilots, but that would've made the entire endeavour of re-using the 737 design pointless. The fact that MCAS

MCAS wouldn't have been required if they retrained pilots, but that would've made the entire endeavour of re-using the 737 design pointless. The fact that MCAS was required was not a failure to design a safe plane. Rather it was a failure to make the plane behave like the 737.