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.
Blackjack, Poker, slots, roulette, baccarat, sports betting, horse racing, betting on sociopolitical events, keno, etc.
I don't agree that gambling can be used as a reference to measure someone's intelligence. Basically most gambling is based on luck, maybe we can do card analysis and counting but nothing is certain, it's all just probability and luck.
However, those who have good emotional control can usually take advantage of gambling. Gambling games usually play more on the emotions of the players, when we lose we become emotional and continue betting to win back the money we lost, or when we win we become emotional/greedy and want to win more by increasing the bet. In the end we will lose more money or lose the money we have won
So, I think gambling can determine a person's level of emotional control, not a person's level of intelligence
Technically speaking, people that is good on statistics and probability has a better chance of winning or rather not losing huge amount compared to dumb gamblers that doesn’t knew to do bankroll management.
In fact, people who are good at mathematics are not necessarily experts at playing poker because poker does not deal all the cards so it is difficult to count. But if one can control the bankroll then it is the best way to increase the chances of luck coming
If we think about what the OP really trying to point out here. He is just using the difficulty of the mechanics of the game to measure intelligence of player like slots is the easiest game while poker is the hardest. 
I agree that slots are an easy game and do not require much thought because we only need to press the spin button. But in my opinion poker is not a game of intelligence but rather a game of intimidation. Whoever can intimidate his opponent can win without needing to open the cards. Apart from that, poker is still a game that relies on luck, because big cards don't always win over small cards.