You got to do what you got to do to make money for the day. Probably did not have a proper selection of screws/shims/spacers to choose from. Use what is on the truck.
That gets you through the day, then why mess with it the next day/week/month/year? You are busy and the machine is working, more important things to repair that are actually broken.
You would like to fix it in the off season, but then there is no money coming in to pay for all the proper repairs.
And then a couple dozen other repairs like that, and that is how a machine or truck turns into a rattle trap.