Video Poker play is relatively straight forward. The play of the game has similarities to other casino games, but it is definitely more complex than playing slot machines. To properly play a slot machine, you simply bet an appropriate amount to maximize your return from the game and either pull the handle or hit a spin button. There is nothing else to so. While it may be true that some slot machines have a button to immediately stop the spinning and go to the final result, pressing this button does not change the outcome; it only helps you lose your money a bit faster.
Despite the importance of finding the best machines, most players don't. That's why casinos can offer both decent and lousy machines in the same casino and be confident that gamers will still play the lousy ones. They have to keep some good machines, otherwise they'd lose all the players who know what they're doing. But most of the machines will be bad, and most gamers will play them anyway. Heck, in Vegas even casinos and supermarkets have video poker, with absolutely terrible paytables, but people will still play them rather than going across the street to a casino where they can get seven times better odds. Go figure.