Without ever seeing the car and wire bundle in question your opinion is pious at best. I spent over 30 years working in factories of one sort or another with more than half of that time in quality control and I have seen first hand a lot of inferior workmanship. And those in the UAW are no exception as I was once a member of that union myself working in the ranks and not riding a desk.
I didn't post this for accolades or to get in a pissing match with you or anybody else over whose fault, if anyone's, it is. I did, however, post it to show the effects of faulty wiring exposed to moisture over time.