All democratic government relies on some amount of good faith. Many of the rules are set up to be guidelines for resolving disputes in a civilized manner, and preventing any single bad actor.
The place where this was most respected was in the transfer of power between presidencies.
That goodwill benefits everyone. If you break it, all hell comes loose. It’s why the Dems have worked so hard to stick to the good faith, even though the other party clearly hasn’t.