My H.S. experience was my H.S. experience...Period.
I'd guess....many H.S. experiences now are not as you describe. There are thousands of H.S.'s that are decent.
IMO, there are many more thousands that are horrible....
But your narrow view is wrong...IMO.
I'm in a relatively rural, predominately white area and am constantly appalled at the clothing, behavior and language of our children.