I've only played the once in a 4p game but we realised that we never passed. After we discussed afterwards we realised how valuable passing would have been in some situations.
While your initial thoughts are to play/burn through your cards as fast possible to get to the next life for either the karmic ring or moving up the ladder, there's situations where you're better off waiting a bit.
You want to hold onto your 3 point cards/deeds for a time where your opponent(s) are both about to die. That lets you play one down, and on their turns they reincarnate, letting you get a second turn where they can't immediately ruin your deed so you can protect it with a 1 point one.
Passing is the only move you have to change the tempo of the game to put yourself in a position to play 2 turns unopposed.