I know. What I'm saying is some stealerships look for non-existent issues to fix and get paid for under warranty.
That doesn't last long when a store goes down that path. All manufacturers perform audits of their franchises that trip red flags. They compare labor operation frequency against peer groups and warranty costs-per-unit-serviced-averages (among other metrics).
When a store trips a red flag, the manufacturer goes up their ass with a microscope and charges back repair orders that don't meet their validation criteria. Those chargebacks can be be in the hundreds of thousands. Once the store is in the audit process, there doesn't even have to be an unnecessary repair performed to add to the chargeback total. The tech might not have time-stamped the RO or even something as stupid as improper documentation will cost the store money. Either way, high warranty costs start the ball rolling...they'll just pile on EVERYTHING they find along the way. It's usually very messy for the operation when things get to that point.
The few dealers that persist even after that kind of smackdown then run afoul of their franchise agreements and lose their operation. That type of thing is rare, for obvious reasons. Dealers get the point
real quick after an audit chargeback.
I get that everyone mistrusts the dealership and that's never going to change. However, having a dealer perform unnecessary warranty work should be the least of anyone's concerns. The manufacturers aren't about to throw millions of dollars a year at unnecessary warranty and they have powerful tools to combat the practice. If anything, there will be a fight to get the dealer TO DO something under warranty if they are running hot with a particular labor operation. No one wants to be on the radar.