what is the endgame of such a claim? they are simply saying that the real reason soo many blacks are poorly educated, poorly housed, and working in crappy jobs or no jobs...is because they are lazy, unmotivated, and just ****kickers. that is the agenda here.
When nearly an entire population is doing poorly, something other than mere choice is happening. Either their environment and history are creating barriers to their success or their environment and history are influencing how they make choices OR both are happening which is my take on the situation. Even your teaching example and your mention of gangs illustrates how students' environments influence them.
It's interesting that you brought up Asians because Confucianism permeated the culture of many Asian populations along time ago. Confucianism's emphasis on education and respect for elders certainly had an impact on how Asians who immigrated to the US fared in the US. So again, we see history having an impact on a group of people. It's the same for the black population.
"It ain't what they call you, it's what you answer to." - W. C. Fields