"If you have any insight as to how your natural family structure can be explained..."
How we live is the result of many "factors", I guess. One is, -family that lives together, already knows each other. You've spent your whole life living together and you know each others skills, abilities, habits, faults, blessings. You know what to expect. As a result you have fewer false expectations of what might happen. In created families, you don't know what to expect. Almost always what happens is that some folks like to work really hard, and others just lay about. Some are neat, others oblivious. It gets to be a huge strain on the workers who sometimes feel taken advantage of. Another problem is diet, another is type of preferred music, another is modesty and nakedidity. Or sexual mores. Then there's the potential problem of the differences between extrovert and introvert people. Some people are "noisy", others seek quiet. (And these days in the States there's one more huge problem. The seemingly impossiblity of most Trump haters to talk with Trump lovers. We talk~they scream -right?. That's something that often stops everything dead in its tracks.) There's just lots of stuff to cause problems among folks who don't really know each other.
We have so many people that come here, I have decided it is a lot like dating. It's easy to fall in love with someone the first few dates. You just have so much in common. It's only later that you realize that you also may have so much not in common. Then you have a problem. If dating, you stop dating. If living together, then what do you do. You're potentially living with someone you don't really like. I suppose when you are trying to create a family with non-family folks, the best thing to do is to get to know as much as you can about each other as possible, and spend as much time together as possible, before committing. And then, once together, work really hard at constantly trying to learn more and try everything to continue to get along. That's often a fatal flaw in many communities. They don't practice enough communication and talking things out. They let stuff build up. And eventually things blow up. ~~That doesn't so much happen with family that is family. You've already been mad at each other at some other family time. If you continue to live together, you've hopefully got past that. But even at that, one of the most important things you can do with each other is to love each other, not aggress on each other, and try real hard to respect each others choices (unless of course they hate Trump.)