Auto Part Stores performing Diagnosis and Repair, is this a good thing or not?

The benefits to the auto part stores are that they sell more parts. Are the parts they sell you going to fix your car or truck? The disadvantage to the customer is that the part store associates are not trained technicians or mechanics. Mechanics go to school anywhere from two to four years and continue their education throughout their lifetime. They own anywhere form twenty to over one hundred thousand dollars’ worth of tools to perform various types of services to various types of cars and trucks. The parts associate, who may of just started his career selling parts, is only following prompts on a computer screen and was taught how to plug in an OBD2 into a car and read a code and then telling customers this is what’s wrong with your car and they need to change these parts.
What always seems to happen is, nine out of ten times or even ten out of ten times, we get a call from a customer a month or week or days later saying, “Well I went to, such and such auto store, and they scanned it and they told me it was this, this and that and I bought all of the parts they sold to me and now I still have the same problem. What do you think it could be?” I’m now left with explaining, “That’s not how auto repair works, and we don’t know why non-technicians are plugging scanners into their cars.”
There is some kind of conflict between the industry and the mechanic. I have invested in licensing, tools, equipment and education yet the part store associate needs none of these. They just follow instructions from a prompt screen, plug a tool into a car, read a code and lead the customer over to a parts counter and sell them a bunch parts they don’t need or will likely not fix their particular problem. This is not fixing cars. This is just selling more parts. I think people will see this soon enough.