I have a good job that I like, but if my wife told me her company was moving her to Japan for a while, I'd jump at the opportunity.
We live where we live because we're 10 minutes from my wife's two sisters, my wife's parents, and 3 cousins our kids love to play with. Generally, I think the only way we're moving is if they move first. Because my wife's whole family is here. And she spends multiple days per week with them. As do our kids.
The idea that she should be supportive of me tearing her away from this support structure is questionable.
Obviously if something came up we would discuss things. But I don't expect her to like it. Even if it involved a pay raise. Even if it involved moving somewhere she would love to live. Because these people aren't there.
It's just as likely codependancy as it would be support.
Do you have kids? What's your relationship with your family like? How good/irreplaceable are your friendships?
For a lot of people, dropping all of these things are inconceivable. I know my aunty was reduced to tears when her son (who is expecting a baby) moved from Woodend to Canberra. To her, it meant seeing her grandkids a couple of times a year rather than spending time with them every week.
I can see it easily. After move, all your friends and all your life are far away. You have to change habits, language, adjust to different culture. You are very likely to be super lonely most of time. And you loose actual support network where you live. You can get some paid one, but that is something different. If she worked or had other ambitions (entirely possible she did not), those are likely gone after the move.
Many people like and have build their lives. And many if not most don't want to uproot and change everything.