Well, NYT is not alone. President Obama even mentioned about Korean education systems insisting the importance of the education reformation in the U.S.
Thus, I understand why the correspondent of the article dealt with Asian parents' dedication to or obsession with educating their children. He must have known his editor in New York office would love this topic!
What I don't agree is that he used the memoir of Yu-na's mom out of context and made an impression that she made Yu-na and her sister unhappy to contend his argument. I don't think Yu-na and her sister would agree with this opinion.