This is what happens with the decline of proper mechanics and their replacement with fitters
My job title is "fitter", but I did a years skills building, and two years on the job training as part of an apprenticeship before I was even considered qualified enough to be trained on my current post.
The person who carried out that "repair" wasnt even a fitter, it was a monkey. We all make mistakes, but if someone that unqualified was doing the work, they ought to have their work inspected.