If we are going to use a car analogy it would be better to use a more fitting one.

Installing an exhaust filter won't reduce lung cancer risk of the driver. Car dealers should be careful if they advertised filters as medical devices that reducing lung cancer for drivers, rather than an filter that reduces pollution for those who live near the road. Exhaust filters are still a good idea for society, but if you want to reduce the personal risk then an air filter for the AC is required. It would however be a rather bad world to live in if everyone installed air filters for the AC and excluded filter for the exhausts.

Outside of garages or other enclosed spaces where the driver might actually get exposed to the cars exhausts.

Ah, I see, you're using "misinformation" to mean "came to a different conclusion than I did".

Misinformation, because it encourages a practice that is counter to the recommendations. Because it allows for a conclusion to be drawn that is counter to the recommendations.

No, here it means "came to a different purpose than I and everybody else using science did."

No, it's bait and switch.