I’m biased because I’m a scientist, but verifying observations and assumptions through empirical methods is typically a good thing. A lot of people believe “common sense” things that are completely wrong, e.g., that lightning never strikes twice, evolution has some sort of goal in mind, to never go to bed angry, etc.
Seriously.
There is always the chance of entering a discussion with someone who disagrees with your “obvious” assertions and also may have the ability to change something. It is always good for someone to actually go and look to prove your point with real verifiable evidence instead of just going “well obviously I’m right” and ending it there.
Hypothetical situation time. You and your SO have an unresolved disagreement and are very angry at each other. It’s late and you’re both exhausted from a long day. You have two primary options: try to resolve it now or wait until you’re better rested.
Assuming all of these things are true, I (and my therapist) would suggest attempting to resolve it immediately gives you the greatest likelihood of an unproductive conversation that goes off the rails and pisses everyone off even more. Waiting until both parties are better rested gives you the best chance of a productive, mutually beneficial conclusion since your mental faculties will perform better…but you’ll be going to bed angry.
Anecdotally, my wife and I go to bed angry at each other on occasion. We’ve both learned to put shit on pause and get back to it later, sometimes days later, because intellectually we know we love each other and waiting will lead to a better conclusion, even if emotionally we’re just two dumb apes who really want to throw down.