Ingrained associations don't die easily. I remember when I first quit facebook. I still had the habit of quickly pressing "F, enter" for months after I quit. After a couple years though, I hardly ever go through that old routine.
Check out Nicky Case's game about neuroplasticity: http://ncase.me/neurons/
Just now I enabled grayscale via the Android developer menu. I noticed an immediate reduction in intensity. It didn't feel like "bullshit" to me! If you want this to help you, you're probably gonna have to give it a little bit more of an open mind. The attitude of "this is bullshit" could very easily sabotage any positive benefits of this exercise. Big things grow from small seeds, but only if you water them, give them light and make sure they don't get crowded out by more aggressive plants.