[Udik]

Kubrick didn't think much of humanity, it's pretty clear in 2001 and in all his movies. His gaze is naturalistic: individuals are struggling for power and sex, sometimes they climb hierarchies through cunning and violence, sometimes they fall. He didn't seem to be that heavily interested in the human psyche.

On the other hand, 2001 is precisely a movie about humans trying to transcend themselves by suppressing anything emotional about them and exhalting pure reason- this is also a factor for the sterile appearance of the movie.