A significant portion of life, irrespective of marital status, is predicated by a state of pending interruption.

Death being the most obvious.

> it's unnatural to be in a state of pending interruption at all times.

I'd think the opposite is true. Interruption is natural, and prolonged sedentary focus is a human invention.

I’d agree with others that solitude isn’t natural, but if you care about your work it’s kind of necessary. I find myself wishing I hadn’t moved in with my partner for this reason. But it’s hard to disengage from that choice once it’s been made.

This is why I loathe interacting with my mother. Love her but could never have her live with me. She had a stroke and doesn't realize she calls at the wrong times during business hours and how she's inconsiderate. Plus, her personality changed and she only brings perfunctory, negative, demanding, and judgmental interactions out-of-the-blue. Can't really talk to her about anything because her mental capacity isn't great, she lost her sense of humor, and she has a difficult time speaking.

It's very natural to the point of being the default of human experience. Being able to expect to not be interrupted is unnatural.