I understand what you mean, but airplanes aren’t the same as cars in this way. It’s in the manufacturer’s and airliner’s interests for the airplane to be as maintainable as possible. Commercial airliners are designed to be used 24/7 for decades. These are long-term investments and idle time is expensive.

Airplanes and cars are regulated as differently as cars and watermelons. If an airliner literally encountered phantom electrical issues it would be grounded immediately, and they’d be fixed — that’s the point of all the civilian infrastructure, like the FAA, that we’ve built up around air travel. I know, it’s not perfect, there are mistakes and sometimes corruption, but for the most part it works. Many parts of every airplane in the sky have been replaced multiple times. It’s the only way they work.