Engineers are wired differently and usually err on the side of caution.
Agreed. I've personally seen baggage handlers involved in about 10 company safety violations in Sydney in the last 2 months (events logged in a notebook and in some cases photographed). This is one person's observations, so you can multiply this by a hundred or so to get a true value of the total number of violations.
It's ironic that engineers now have to lug around those witches hats on every transit in Sydney because baggage handlers have run over and broken aircraft refuelling lines in the past. I also seem to recall one baggage handler snapping off a VHF antenna with his head when he drove under an aircraft in a small tug at speed.