That summary ignores all the relevant context. Since the 1980s, TJ has been a highly selective public high school. The average test scores there are comparable to several Ivy League colleges. As is common all over the world, TJ’s admissions process was based on standardized testing and grades. This was completely uncontroversial for decades.
The National Merit Scholarship is based on a standardized test called the PSAT. It’s not the most important thing in the world, but important enough that every year the Washington Post would publish the list of students from the DC area who were selected. This was great marketing for the school, because TJ students were like 2/3s of all the students recognized out of dozens of high schools in the area. There was no pizza party, but the school would go to some effort to publicize the result because they felt it reflected very positively on the school.
Two years ago, there was a huge fight over TJ’s admissions process. The school had become 70% Asian, and had very few black students. In that fight, progressives attacked standardized testing as racist. The progressive school board then changed the admissions process to a lottery system. A federal judge found that the change was motivated by anti-Asian racism: https://www.baconsrebellion.com/wp/we-won-coalition-for-tj-w.... Then an appellate court overturned that decision, and now the Supreme Court is deciding whether to hear the case.
In that context, what the article is about is the TJ administration downplaying the National Merit Scholarship results, which until recently they had publicized and pointed to as a source of pride. The story is thus about a deliberate decision by the administration to downplay a certain kind of educational metric, based on progressive ideas, that until very recently the school had embraced as an important metric.
Frankly it’s bizarre for someone from outside the US to say conservatives are waging a frivolous “culture war” here. What the conservatives want to do is keep the system that TJ had until two years ago, which is still the system most of Europe and Asia has.