Clan societies in UK

[User]

...
There seems to be something of the inverse square law at play in these matters, and the further away from the point of origin, the stronger the passion is felt. So, those clansmen who return to Scotland from overseas display far greater exitement and enthusiasm for a Gathering than those who live locally. It's not that locals feel less strongly per se, but they have the relaxed familiarity everyone feels when at home.
...

As one would expect, that effect applies to all humankind. My wife comes from a culture that never experienced a diaspora. But as she is far from her homeland, she now has an interest in aspects of her culture that she was indifferent toward when she was surrounded by it.

I can only guess as to the reasons why. But I suspect she yearns to maintain a connection. When you're living in a culture, no maintenance is required. As you mentioned, when you live in a culture, whatever you do IS a part of that culture. Being removed from it creates a perspective shift.