Nobody has said that.
But really, if you publish something in 2022 that conforms to the values of something written in 1985, with all the (un)intentional sexism, racism, and other bigotries of the time, and without any understanding of what tropes are no longer interesting--who do you think would buy it?
And absolutely nobody has said that they hate the thematic core of Dragonlance. In fact, lots of people have said that they love the thematic core. A great war, involving dragon-riding knights, between Good and Evil. With draconian super-soldiers on one side.
What people don't want are the stupid things in the setting. Cosmically "Good" people and organizations that allow for or actively commit evil deeds. Mary Sue kletpomaniacs. Ablest caricatures. Poorly-thought out white stereotypes of Native Americans. And so forth.
The real question is, why is it so important that these things remain in the game?