Like what? And what are we talking about when it comes to "smart" and "not so smart"? I did a thread on this exact topic about a year or two ago and it got spun and twisted into the fact that I was racially prejudiced when it had nothing to do with that at all. I discussed how I used to go into predominantly black rooms from the early through the late 60's looking for action, and many times came up against guys that didn't come close to graduating from HS and were dumber than dirt, but had tremendous street smarts, aptitude and negotiating skills for matching up and gambling, who could also shoot the lights out on the table. There were some of the toughest and best players I'd ever seen that could barely read.
If anyone here has the Jan. 2003 issue of Billiards Digest, there's an article in there about all of these PhD.'s, physicists, geochemists, that work out of Argonne National Laboratory just outside of Chicago that play pool in a weekly league, and I can tell your right now based on the articles description regarding how they play...their smarts don't help one iota. Ron Shepard, Ph.D. who has written one thesis after another on pool subjects such as deflection, etc. is a member of that league and is one of the best players.
It also goes on to say that he can consistenly run 4-5 "BALLS". Whoopteefuckindo.....I don't think that was a typo for "racks". Then again, that was a little over 2 years ago. Maybe he had a late night epiphany while at the blackboard that gave him the secret. Must have been that deflection crap.