I'm not talking about games overall, just games made by AAA companies. There's certainly still games that cater to a hardcore/competitive audience but you have to look a little harder for them and they're usually coming from indie developers. But for a AAA studio casual is where the money is and it's the philosophy driving their game design even though from their perspective they'd probably call "easier to get into" or more "intuitive" or "streamlined".
Look at the difference between Starcraft Broodwar and Starcraft 2, Diablo 2 and Diablo 3, Dota and every clone like LoL and Heroes of the Storm, Hearthstone, Overwatch. All of the sequels and successors are more shallow and casual than what came before. And the novelties these games introduce are better characterized as gimmicks to hook casual players. Why make a game that caters to a hardcore audience? That's just limiting your playerbase and limiting your potential profit.
Look at the difference between Starcraft Broodwar and Starcraft 2, Diablo 2 and Diablo 3, Dota and every clone like LoL and Heroes of the Storm, Hearthstone, Overwatch. All of the sequels and successors are more shallow and casual than what came before. And the novelties these games introduce are better characterized as gimmicks to hook casual players. Why make a game that caters to a hardcore audience? That's just limiting your playerbase and limiting your potential profit.