Procedures going at cross-desire

Provided you’re with a group where trust and a common love for theme-setting are established, how can rules and procedure go insidiously at cross purpose with the players’ desires?
I see being unclear on who says what over what and when as the main factor for me. Lowering fictional stakes maybe. Do you see more love breakers?

I don’t think I understand. Could you elaborate?

OK let’s say prior to play you have trust and safety workshops. Then everybody chooses unanimously to play a cozy farm animal.
What could go wrong?
The question in itself appears simple to me but the scope is wide.

I have two leads : distribution of speech and responsibilities, and lack of drive.