Why do Tom and Daisy leave in chapter 9?

There could be many reasons for why they left, I feel that
they leave to not have to face the reality of their actions. In the beginning of the
novel we learn from Nick that in the end Gatsby was the one that stood out as the
'best'in his eyes and at the end of the novel Nick tells Gatsby that he is better than
all of the them put together. Gatsby signifies the hope that the dream is eternal.
whilst Tom and Daisy only destroy dreams, they do not care enough to stay and face the
consequences of their actions. Destroy and move, that way you do not see the
wreckage.