Most of your point is well made, but electric engines are just as tied to physics, unless I'm missing something? Doesn't mean quality of the control software is still not concerning.
However, I'm pretty sure any modern internal combustion engine will have a highly advanced ECU computer too, so this is sort of a non-issue (though I'll admit I don't know much about aircraft engines specifically).
[1] https://en.m.wikipedia.org/wiki/Switched_reluctance_motor
Gist is going from internal combustion with a ton of supporting or fully necessary tech to fully electric, fully SW-driven, really skeeves me out given the above testimonial and others like it.
I openly allow it's quite possible that airplanes can't fly these days but for software though.
Sure you or your friend may have had a bad experience at that company, but the big players generally won't let software bugs through.
Boeing code leaked in '20 [1] and it was ugly, however it was ~network vs. app layer so unclear how it worked at the engine level.
Add in the track record of CAN bus security difficulties and knowing airplanes use similar tech, "generally won't let bugs through" when paired with the footnoted security leak is a gross overstatement.
[1] https://www.wired.com/story/boeing-787-code-leak-security-fl...
Before you write it off as an overhyped wired article, it was also a presentation at blackhat [2], so vetted by a fairly rigorous CFP.
[2] https://i.blackhat.com/USA-19/Wednesday/us-19-Santamarta-Arm...