Your post might lead one to think that what occurred in CA or with Truex's car didn't violate a rule. Really? They why did NASCAR impose a penalty and have to implement a new rule in CA? Oh, that's right because the Team violated rules. Also, you are splitting hairs. The teams saw what Truex did in Atlanta and decided to roll the dice knowing that NASCAR really wouldn't do much to them. In the process they made the sport and the sanctioning body look bad.
The Teams continue to wonder why they are having trouble finding companies that want to be involved in the sport. Companies have millions and possible billions of dollars tied to their brands. They don't want to be affiliated with anything that might tarnish that. When a 1/3 of your field can't get through pre-race inspection either those teams don't have personnel that can read a rule book or they are bending the rules/cheating so much that the car can't pass the inspection. So, as a company I am force to pick between merging my brand with cheaters, buffoons, or not be associated. Doesn't sound like a hard choice to me.