I'm guessing he chose pool because it's basically a solo sport (certainly the practice he talks about is). He doesn't seem to have a feel for the interpersonal

I'm guessing he chose pool because it's basically a solo sport (certainly the practice he talks about is). He doesn't seem to have a feel for the interpersonal dynamics that occur in a head-to-head game -- think McEnroe vs. Borg, Fisher/Spassky, etc.