Sounds like someone has never had to replace a wiring harness or deal with electrical “gremlins.” Also a lot of parts are just really terribly made these days. I had a 2000 car that was already succombing to modern plastic everything crap philosophy. Basically all the motors controlling the windows or power door locks were shot or close to shot. The internal gearing was all plastic and had gone brittle. The fix? Take apart the internal panelling and replace the whole motor assembly with a new unit that has the same fundamental issue with it, even though a five cent gear or clutch is what broke, until you can source no more new oem units, at which point the part is broken until the end of time since all the junkyard stock will also be rotting apart. This is the world we are building for ourselves.