That controlling games have gotten complex is rather the point. For most people spending hours trying to learn to walk in a game is not worth it. And Is there really that much of a pay off for all the added complexity? Because again, games were not always like this, is an Uncharted that much deeper then a Megaman or a NES Zelda? I mean your go to example for playing a modern game is learning to drive a car!
Never mind that when things like wii-motes and touch screens come in to try and bring down the obstacles modern gaming has erected around itself gamers lose their minds and call the death of gaming. People HATE the idea of Nintendo trying to make more inviting controllers, what they like is the Steam controller, one that adds even more inputs
Of course the average person is flocking to mobile in these conditions you want a classic style game with easy to learn controls that let you get in too playing? that's your main option. There's a reason Pong is what created the gaming industry and was a massive hit and not Computer Space, one was simple enough for a drunk guy in the bar.