And to address the question, does your reasoning imply that this is just a bad employee? It was his first ffff up, so it sounds like he shoulda been canned after this incident (according to that reasoning)!
I've already pointed out they don't fire you for screwing up. They fire you for not learning from your screw-ups, screwing up repeatedly, or even worse, hiding screwing up. And it's not like a couple of marks on your record is the end of the world, btw.
Only if I have a fresh layer of grease on the fifth wheel, I deflate the air bags and just barely get under it before inflating them to back the rest of the way to the king pin. No new grease I keep them inflated.
Carefull now...the lastest posts you put up sound a little like some of mine...and once you get on the congregation's bad side, they will circle the cult wagons and start chanting...that's how it all started for me.