2.) People probably spoiled it for you anyway
I published a post a few days ago detailing how popular games tend to be ruined because of how well-known their plot-twists are. Well, that's another reason why it's difficult to play old games. I presume that one would play an old game because friends would often gush and recommend it right?
Chances are everyone else on the Internet is too, and you will be spoiled regardless if you were actively searching for a particular game or not. Check out my previous article to know more about how knowing plot-twists or even the story itself affect how you perceive a game.