Having been on the stand in court roughly a bajillion times.
Are you a licensed tech for the make/model of your car? No?
Are you a licensed installer for that brand hitch? No?
When was your torque wrench last professionally calibrated by the manufacturer?
When were you trained by the torque wrench manufacturer to the proper use of its tools?
Good idea to check obviously, especially if you live in a rust belt. That pic, wow. I can drag a hitch out of a lake after soaking for 20 years and not have it look like that!
But it won't do squat to prevent or win a lawsuit or have a few hours of retarded questions like the above thrown at you
Ignorance is in many times a better defense in civil court. "Nope I'm not professionally trained etc, I personally believed that every part on the vehicle was professionally and correctly installed, how could I possibly know any different?"