From what I can see from an EU perspective: The training you get to become an officer in the US seems to vary a lot between places. That explains lot of differences.
Also it’s quite short IMO. Here in Germany it takes 2 1/2 years to become a policeman, 6 Months of these as a trainee. And still we have a number of problems.
They might just try a cold pull or two before changing the nozzle. (Depening on the printer. On my Ender 3 Nozzle swaps were a no brainer - 2 minutes, on my current SV08 they are 15 min of work and 45 min of soaking the old nozzle in Isopropanol to get the thermistor out without ripping the cables)