I know for sure that sports bet gamblers and lotto gamblers do a lot of calculations and predictions, you'll see then in bet shops and they'll take a very long time in forcasting the outcome of games, for lotto, it's string keys that'll give them accurate winning numbers. I believe the amount of time that is involved in calculations of these bets means that it's gamblers must be intelligent, otherwise they won't be spending much time in bet shops for nothing. They even have vendors that can predict and sale winning numbers for lotto, and winning teams for sports bet, theses are things that I've witnessed, it's not that I was told.

Although no matter the level of intelligence that is displayed in gambling, the luck factor still plays a major role in the outcome of the bet. So it's better that a gambler is betting to entertain himself, with amount that he can afford to loose, so whether win or lose, it won't affect the fun.