I'm 63 years old and have been a Gamer since Pong's release in 1972.
I have continuously played, every conceivable type and genre of game, since that first day in the local arcade, not once have I "played", or continued to play based on a theory or a set of constructs that I needed to follow, due to some college graduate who has nothing better to do than "theorise".
I fully understand the need for games developers to follow certain guidelines (Theories) to make a game attractive and hopefully a pleasurable / playable experience, which in turn will stand the test of time, for at the very least a profitable outcome.
But as a "Gamer" first and foremost I need fun, followed by a sense of achievement, no matter that in the greater picture is actually meaningless, this is then taken to the next level by social involvement, welcome to the land of MMO.
I played WoW from day 2, I decided the lagfest of day 1 would take away from my "Fun", over the next 8 years I quit 4 times, not due to the theory or concept the game was based on being incorrect, simply because it stopped being "Fun", being in a social group and taking part in Raids and chasing that next piece of "Uber" gear, became a drudge, so I walked away, only to return when I felt there was a chance the "Fun" would return.
So back to 1972, Have you played Pong lately with a couple of mates and a few beers ??.....................Soooooo much fun, and not a "Theory" in sight, if it ain't fun ..... no one "Plays"
Just to add an apology for the use of speech marks "It's a bad habit".