This is an interesting perspective, and it's something that I found weird when I started working with Americans - they're so cagey about their non-work lives compared to how people are in Ireland. With most of my previous co-workers I'd know their backstories and their partners/spouses/kids names, even if I've never met them, but with my current (mostly American) team unless I actually ask people this stuff they absolutely only ever talk about work, unless they have a story or two that from their real lives that fits with their work persona
To me, talking with people is a really normal activity, but it's gone weird places with people who seem to think we have a super intimate relationship because I talked with them a little. And they reflect that back to me as being far more conversation than they've had with anyone in ages and now want to treat me like their personal possession or some nonsense.
Just being less share-y and drawing certain boundaries seems to be the only effective approach. Being what I think of as personable, polite and diplomatic just goes really weird places at times and then I can't get rid of people who latch onto me like obsessed nutcases.
Reading up on some Irish playwright helped me feel more at peace with some things.
I'm American. Born and raised here and spent most of my life here. But I tend to get misread a lot by Americans and tend to hit it off better with foreigners, third culture kids, people who have traveled a lot, etc.
Anyway, your comments have given me lots to think about. Thanks! Hopefully you find ways to improve things for yourself too.