It's bad for a lot of players that won't role play at all. They roboticaly just Make Moves vs the GMs DC Objects. "I get a 17 and by pass Object 11". It's like playing a board game.I don’t think immersion and rules knowledge need be at odds. I certainly wouldn’t feel immersed in a game where I didn’t have some actual sense of odds other than pat descriptions like those of the wall. How good am I at climbing? How difficult is the wall likely to be? These are things the character can gage in some manner that goes beyond mere description from the GM.
Worse so many players won't even play the game...that is do anything in the game...unless they know they will succeed. If there is a chance they will fail they just won't do it...or anything. They come to a locked door with a high DC...one they won't just auto open...and they just top playing...."Well, can't get past the GMs Impossible Door!"
And the worst immersion breaker is when the players just metagame...."oh we ignore X as it only does Y ". And often they just go for the Exploit : "Oh..um...we randomly attack the troll with fire for no reason".
But toss something at them they don't know....something not in the core rule books....and they freak out.