In the early 1970s, when video poker was introduced and was still struggling for acceptance, the machines were usually referred to as "poker slots." And video poker has a lot in common with slot machines. They are easy to use, requiring no interaction with a dealer or with other players. Card combinations, like slot reels, are governed by a random-number generator.
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.