Yeah. Now, I should add, HOW you engage in those "negative" interactions makes a great deal of difference. If you are contemptuous, belittling, stonewalling, or abusive, that is a "negative" interaction that is very destructive. So there are different types of "negative," and it matters a lot how you handle it. What we're talking about (I think, I haven't dug into it enough to be fully informed) are the typical frictions, disagreements, or conflicts that come up in the course of normal life.
It makes sense. Two different people will always have points of disagreement or friction. You've got different preferences, tastes, emotional states, points of view, etc. So you're going to occasionally rub each other the wrong way.
Engaging that stuff is part of learning how to operate in relationships -- negotiating differences, coming up with compromises, or maybe just tolerating the differences. It's also part of how you get to know another person. You learn a lot about a person in conflict/disagreements. You don't really know someone well, if everything is always niceness, agreeableness, and pleasantness. There has to be a little friction now and then, because that's just a natural part of being two different people interacting.