Approaching 20yr ago now I sat through a training on the state automotive inspection license for reasons have to do with software that ran it.

Slide 1ish: State cares about emissions, take it very seriously if you want to keep your license.

Slide 2ish: State gives no fucks either way about "safety" inspections, they don't affect squat and aren't worth the money so far as our studies and stats can tell

Slide 3ish: If it wasn't obvious, "safety" is your blank check to sell work and in return the state expects you to take emissions seriously.

The rest of the slides were technicalities and requirements and the final slide was a recap of 1-3.

I too am glad I was exposed to such things early on.