>Auto repair is 90% diagnostics and 10% wrench turning. A lot of newer vehicles have symptom matrixes with a process for repair. Lowering the skill floor for mechanics.

That’s unfortunate because nobody actually knows what is doing and everything is fine as long as it falls in the guidelines, if they found a problem that is not “in the books” they have no clue how to proceed and this problem not only applies to mechanic shops, i’ve seen the same situation in the medical field.