Poker, like baseball, hockey, and every other game, alters its rules based on the current knowledge about the state of the game.
Back then, only those who didn't need to work for a living (literally aristocrats) could participate in government. Unless you'd like to deny participation in the government to anyone who isn't already rich, there is no alternative.
Fixed that for you.
Throughout history parents have always been given control over most of their children's activities. So why is it when it comes to violent and mature video games that parents want the video game industry to stop their children from buying the games for them?