I was brought up in a different country from grandparents, aunts, uncles and cousins because my parents emigrated. My children were brought up in a different country from both parents' extended families, too, because we repatriated after we got married! Now DD2 has emigrated abroad to marry.
She didn't choose the country; she fell in love with the man. It's different from choosing where you'll live as her parents and both sets of grandparents all did. She has made sacrifices, being unable to work until a lengthy process of checks and form-filling went on. Her career ground to a halt and she has more hoops to jump through before her qualifications are recognised, though she has walked into a very suitable job in her field the moment her work permit came through.
She would have been home once, probably twice by now, were it not for Covid, but they agreed annual trips for her as part of the deal they thrashed out before they tied the knot.
She has a law degree, so she thought about all the implications, but I think most people are smart enough to look ahead and think about what they will need to agree without needing legal training!
She would never have chosen to live where she does but for the man. His job couldn't flex, being geographically determined, but hers could. 🤷🏼♀️