Does the type of game you play at a casino or sports you bet on show an individual's level of intelligence or how smart a person is?
Blackjack, Poker, slots, roulette, baccarat, sports betting, horse racing, betting on sociopolitical events, keno, etc.
The first five are EV- games and the next three are EV+ games.
However Expected value being positive or negative does not indicate the level of intelligence of a person.
In fact that intelligent person will not be the gambler but be the casino in order to make money. 
Maybe you are indicating that skill based betting means a person is intelligent - it may or may not be correct. They have the skills no doubt but luck is always there and your intelligence has no factoring on this. If that was the case then intelligent minds would have beaten every casino out there.