I don't know if you've read The Great Gatsby, but it's full of symbolism and social commentary and also very much about The Lost Generation and dealing with the trauma of the First World War and I seriously doubt that would be able to be communicated effectively with the Dr. Seuss version.
Again, there is no way I could see that simplifying that book would be able to express its themes properly. What is the point of simplifying it? Just read a different book.
I care that a book I love is being stripped of its meaning for the same reason I cared when the shitty movie with Leonardo DiCaprio came out. Because it's something I treasure and I don't like seeing bad things happen to things I treasure. I'm not sure why this requires so much explanation.