They can get away with it in the United States because "profiling" is against the law.
I live near a smaller city. On the rare occasions I venture into or through said city, I frequently see YOUNG men of various minority ethnicity, wearing huge tee shorts and sporting multiple tatoos, cruising around in Bimmers and Mercedes, with tires and wheels that must have doubled the cost of the vehicle. If you listen to these "gentlemen" speak, it's obvious they were allowed to graduate the eighth grade only to rid the school of another headache. There is no way these clowns can have credit, so how are they buying cars that I, as a licensed professional for more than 20 years, can only read about in Car & Driver? Obviously, they are selling drugs. But -- the courts have ruled that police cannot rely on the obvious in forming a "reasonable suspicion" regarding an individual and suspected criminal activity. My brother used to work on a BMW dealership. He said it was not uncommon to have a 19-year old walk in and plunk down $80,000 in cash for a new Bimmer. Everyone knew where the money came from ... and nobody could do anything about it.
As in many things, that's a two-edged sword. Where the need for a reasonable suspicion to be based on concrete facts protects law-abiding citizens (like me) from police harassment, it's a good thing. When it prevents the police from targeting "yutes" who are OBVIOUSLY drug dealers (unless they are commodities traders), it's a bad thing.
