BCoz it's played in two different parts & cultures altogether. It is only recently that one is getting to know about the other game, specially in the Subcontinent. I played baseball in my school & also cricket and I used to like both, but couldn't follow BB while Crick was all around me over the years, so the interest in BB didn't last much after school as a player & neither as a fan.
The statement opposite to yours (Thread Opener) is equally right, for the same reasons. If a person can like combinations of Cricket & VB, Crick & BktB, Crick & FB etc etc, why not BasB which is to some extent more closer (yet quiet different from crick, though) to cricket than any other sports mentioned above.