You can pretty much eliminate angry disagreements in a relationship with assertive communication techniques- I recommend the book “when I say no I feel guilty.”

I am okay if my wife disagrees with me on things- I don’t really care to convince her, there is usually no point in (or possibly of) doing so. If there is something that requires an actual real world action- and it is really important to me, she will concede even without agreeing because she cares about me, and I would do the same for her. Disagreements over simple life things can be a fun subject for light teasing, flirting, and joking that help you grow closer.

I think a lot of people confuse honoring and validating each others emotions with matters of fact and opinion. People argue about facts they don’t actually care about, it isn’t usually what the conflict is really even about!