Re: The reason that the Max series need MCAS
No, that isn't true.
The computers have "normal" mode for when Everything Is Fine, and "alternate" modes for when the proverbial excrement has impacted the air recirculation device.
In the normal modes, it does all kinds of clever stuff automatically, to the point where it can technically handle flying and landing almost entirely on its own.
As it loses sensors, it fails back to simpler and simpler rules, based on how much information it is sure of.
In the worst of the alternate modes, it simply drives the hydraulics exactly how the pilot asked, because it knows that it has no idea what's going in.
That's supposed to be the basic concept.
Boeing appear to have forgotten this.