This is way over the top. Boeing will be fine on account of being too important to fail (and we can debate endlessly whether that’s a good thing or bad thing but that doesn’t change the veracity of the statement). Boeing’s customers wanted the Max to be built on the 737 platform. You’re vastly underestimating the impact of a new airframe on carrier operations if you think it’s as simple as simulator training.
I think above ALL, Boeing’s customers want airplanes that only make controlled landings. If that’s unachievable in practical terms with the current airframe, then it shouldn’t exist in its current form.
> Boeing’s customers wanted the Max to be built on the 737 platform.
You say that as if that's an excuse. What Boeing's customers wanted is irrelevant, but in any case, your claim is incorrect.
Airlines just want a plane that can make them money. Boeing could have build them a plane much better than the MAX, but they chose not to because if they had done so, then the airlines would have the option to switch to Airbus.
The Airbus option would not be on the table if Boeing was just selling them another 737 variant.