Well, one example is: Dealership hires young techs to working on the vehicles, he/she has some auto tech training or mechanical background or no experince, are still be an apprentice technician. Apprentice tech is unskilled in the type of the repairs. Even they (apprenticers) can become a good mechanic in few days depend on their mechanical ability.
Long time ago, I used to remachining brake rotors/drums like old fashion way. But today's younger technicians are real pussies cuz they dont like the brake lathe machines that make them noises, and other is lazy work as they want new parts to be install on the job instead of rebuilding calipers or wheel cylinders whatever.
Time is money. Big changes in automotive repairs. Sad.