1) They genuinely don’t like the 1619 project.
2) They understand that the Pulitzer is supposed to be an award for good journalism.
3) They believe that journalism about some subjects is more likely to win a Pulitzer without being the best by illiilliiililil‘s standards. You could compare it to the concept of an “Oscar bait” movie: https://en.m.wikipedia.org/wiki/Oscar_bait
I’m not sure I agree with this criticism - I think exploring tough subjects can lead to great work that is especially deserving of praise.
https://www.nytimes.com/2019/12/20/magazine/we-respond-to-th...
Now high school students can write nonsense in an essay and cite the New York Times as a source, and get A+ from their teachers. This is the real purpose of it