> So many of these articles are a single person who succeeds and as a result declares racism must not exist.

That is not the evidence the author is submitting. His argument rests on the fact that Cuban immigrants outperform Mexican immigrants in many metrics, which thus disproves the racial discrimination hypothesis. He likewise cites the dramatically different performance of Ghanaian immigrants versus African Americans. These statistics are not subjective.

He then draws on his own experience in the Latino community and hypothesizes the disparity of performance in Mexican immigrant communities stems from a parental culture that encourages short term gains at the cost of long term reward.

There is more to the article but I’m going to butcher it by summarizing it. It is well worth reading and thought provoking.