There are plenty of drug dealers who keep their house and car in conditions from spotless to 30 minutes from clean like everyone else. There are plenty of non-drug dealers who have trashed homes and vehicles too.
You only notice the ones that are making poor choices or have some mental health issues. Sometimes they also sell drugs.
My old car was that way. I remember a friend climbing in for a ride and being so embarrassed that the back seat was full of empty beverage bottles. When I finally got a new car, I told myself "no more." 18 years later, the car looks its age on the interior but it's not full of trash.
My desk, on the other hand, is still just piles of stuff loosely organized by "newest on top." 😒