Oblivious
Part of speech: adjective
Definition: Lacking awareness; unmindful. Failing to remember; forgetful.
Example sentence: I think the industry is oblivious to the fact that most people listen to all kinds of stuff. I personally don't know of anyone who listens to only one genre of music. It's vanity because no one does.
Inattentive
Part of speech: adjective
Definition: Of or pertaining to lack of attention; not paying attention; careless.