Here's one that's particularly sinister, and shows up in nearly every RPG and MMORPG:

Progress is tied to presence, not performance.

In these games, as long as you're there, in front of the screen, you're making progress. Skill is almost never involved in success - if you can't beat that boss you just need to go kill a few thousand boars and level up a little bit, and if you want that sweet equipment you just have to put in the hours to grind for gold, or faction, or honor, or whatever.

In the real world, getting better at something generally takes actual work, and only occurs under specific conditions of deliberate practice and proper feedback. But it's so easy to fall into the trap of "hey, I'm doing something tangentally related to goal x or skill z, I must be making progress at it".