Way back in the 1990's, the shop I took my company truck to was owned by an old-time mechanic (who had quite a good grasp of electronics).

He predicted what we see today, way back then. "Quick oil change" shops and "tire centers" were popping up all over. He saw how this was taking a lot of income from real shops, and that it would drive down profits for real shops - and wages would fall as well. Wages fell. The incentive to learn how to do MORE than mount tires or change oil was fading - and with it, the passion of millions of "mechanics" and "techs". Go talk to the guys at quick lubes or tire centers - they will tell you, the pay sucks and many work without ANY benefits. They don't give a damn about your car, and there is no reason for them to care, it's just a crappy job that puts food on the table today.

Today, quick lube and tire centers are staffed by those who cant find other work, or who are in school for preparation for other careers. The real savvy guy (like who I once went to see) is dying off. And there is little incentive to take his place.