Nice, you just outed yourself as being completely clueless. There exist many good sensor fusion techniques for summing the output of disagreeing sensors.
Except when getting rid of something results in a non-working system. Reduced complexity doesn't work as evidenced by Tesla's inability to have a single driverless mile after nearly a decade of development.
Did you forget why the 737 max had 2 crashs ?
The alert of the difference between 2 sensors didn't work / wasn't there.
So the system was relying on 1 sensor.