Not at all surprising really.
If you only have massive, blowup fights once problems get to a boiling over point, you will secretly build up resentment and anger towards the other person over a long period of time which makes you feel negatively about them, pretty much all the time.
Then when you do fight, it will be explosive and likely will end with both people saying things they regret in the heat of the moment that deeply wound the other person, possibly permanently, and are things you can't take back once you say them.
So, do we have any examples?
Of course there are...
Scenario A: On Saturday, he goes out in the morning to play soccer with his friends, leaving her at home with their son. She tells him she won't be home for lunch and comes home late. So he comes home at 6 pm, and she's a little furious and asks him, "Where have you been all this time?" in an angry tone.
The next day, she goes for a run in the morning and comes home at 10 am. He tells her that next Saturday he'll be out for a while, and she asks, "So, you'll be out again, and what time will you be home?" "Are you going to do it like last Saturday again?" in a fed-up and resigned tone.
Scenario B: On Saturday, he goes out in the morning to play soccer with his friends, and he tells her he'll be back at 6 pm, meaning she'll have to look after the baby alone. When he returns at 6 pm, he tells her to take a break and that he'll watch the baby until dinner.
The next day, she goes for a run in the morning and comes home at 10 a.m., and he tells her he'll do the same next Saturday, if she agrees.
In this case, in scenario B, the dynamic is much clearer, even in the absence of an argument.
An example of a small argument that comes to mind is when there are misunderstandings between couples, and they start to raise their voices, and they use the Four Horsemen that Gottman describes, which lead to the death of relationships.
Arguments must be handled in a specific way, and this depends on the person's communication style.
In the couples I observe, arguments almost always involve one of the Four Horsemen.
In your experience, have you had the opportunity to observe how these impact the relationship?
For example, if there was an argument because a glass of milk fell on the floor and the glass broke, a dynamic with the Four Horsemen would be "You're always the same," or "Now clean everything up," or "Did you break the glass too?!" While in a dynamic without the Four Horsemen, it would be "It could happen, did you hurt yourself?", "Be careful with the glass, do you need help cleaning?"...
So it's not the "argument" itself, but the "how" you argue that's very important, and in many couples, the Four Horsemen are always present, so my yardstick for evaluating whether a couple is healthy or not is also to remember this.
I'm curious to hear from you.