Either they don't trust their car's air filter and prefer to breathe in the rancid "COVID soaked" Highway Air, among other direct pollutants, or this is their alternative solution to stick it to "BIG AIR FILTER".... I can't decide which.
...Oh wait! 3rd Option! His Hooker has to sound like Darth Vader and he finally got someone to agree to it!

All are acceptable answers imo though....(SHRUG)