How MCAS slipped through certification process was not the main issue (mistakes in complex products can happen). The main issue was Boeing not caring that MCAS was dangerous even after discovering it.
After the Lion Air crash, it was very apparent to Boeing that MCAS was not safe. This whole article focuses on how MCAS slipped through development+certification - but really even after Boeing new the dangers of MCAS, the MAX still was allowed to fly.
It was hidden and dangerous. Then it was open and dangerous but was still defended by Boeing. Damning.
After the Lion Air crash, it was very apparent to Boeing that MCAS was not safe. This whole article focuses on how MCAS slipped through development+certification - but really even after Boeing new the dangers of MCAS, the MAX still was allowed to fly.
It was hidden and dangerous. Then it was open and dangerous but was still defended by Boeing. Damning.