Here's a nice illustration of mechanics vs. graphics. https://twitter.com/robotduck/status/759529875992698880
The game is presenting one thing “this is very dangerous you could slip and fall and die at any minute!” while the mechanics are saying another thing “There is no danger just a linear path”.
It’s not that the author thinks we should remove decoration but that the decoration should be authentic to the situation the player is is in.
If the game is presenting danger, BE DANGEROUS! If the game is presenting anxiety, BE STRESSFUL! But this in between of presenting danger without the play mirroring the experience is disengenuous.