That's a harsh truth that's easily ignored, especially by people who didn't grow up in diverse communities. During my education the "behavioral bell curve" for

That's a harsh truth that's easily ignored, especially by people who didn't grow up in diverse communities. During my education the "behavioral bell curve" for each culture was clearly not centered in the same place. One population had a lot less free time at home than the rest of us, and their grades and eventual careers reflected that. Another population made up a majority of the disruptive pupils who didn't seem to care all that much about their performance. A third was far less driven than the first but much better behaved than the second. The trajectories of these populations largely reflected the manner in which they were raised. To be clear, there was nothing inherently superior or inferior about any of these kids. All the populations had outliers in both directions. That's also not to say the academically maladapted nature of some cultures are exclusively or even primarily the fault of those cultures. I do, however, believe the continued determination to not address these disadvantages represents a failure on the part of educators just as surely as a refusal to address visually-impaired students would be a failure.