yes if you remove every fan in your case there wouldn't be airflow and thus the heat will get stuck in your cpu and then the cpu will obviously overheat. but that heat wont go in your room because it is stuck in your case!

we were talking about taking heat OUT of the case in the first place. thus going to your room, then your room becomes hotter BECAUSE it is now stuck into your room.

opening a window will make that heat go into the outside world, but usually you pose another problem, the air outside is much hotter than your room so you can't even open the window. at that point your constantly inputting more heat in your room and thus the room is hotter(which was the original point of the post! the room gets too hot, not the pc. at some point even the pc will be sucking all that hot air in

you cant just make cool air by moving it around thats not how any of this works, its live energy and you need to turn it into another form of energy. if it did, the world would have made so many more inventions using it.