It definitely didn't seem that loose to me when I looked at it.
They could have also could have not put one on there in the first place. Sometimes techs can be sloppy or in a rush just trying to get people out the door especially with general maintenance where they don't make much money. It is just a breeding ground for mistakes. I only really trust my boyfriend's shop to work on my car lol now a days (unless it's a recall or warranty related). Ive had some bad experiences with dealerships and don't really trust them anymore which is sad.