This is a totally bizarre strawman argument. Safety-critical software has almost nothing in common with Microsoft crapware, or indeed, most typical desktop software. Even within the desktopo software industry, MS has never been held up as "best-in-class", but rather the butt of jokes.

As the other poster said, it doesn't take a genius to figure out that a new safety-critical system needs its sensors to be redundant. It wasn't stupid, though, it was malicious: Boeing wanted to hide the existence of MCAS so that pilot retraining wouldn't be required.