The key words in that Jamestown piece are "to eliminate coercion vulnerabilities". No difference whether you were "residing" or "studying" in the US when CIA wanted to abduct you.
No, coercive vulnerability only truly arise when you move a significant, if not the overwhelming majority of your life savings abroad.
For the CIA to openly kidnap Chinese nationals in America to use as leverage is a massive escalation that will catapult the issue straight to top international incident (as happened with the Meng case). But for the US to seize a random house and bank accounts is basically a Tuesday.
Studying abroad is low risk as you will just be renting and unless you broke any laws, you can get home eventually without loosing too much time. The main threat the US can apply to students is deportation not illegal detention.
But if you relocated family abroad, odds are you have purchased property and have significant amounts of funds in foreign banks to support your overseas family. It would be child’s play for the US to seize your assets under the pretext of a plethora of excuses and you can basically kiss those asset’s goodbye, as even if you do have a great case, the legal costs of fighting those charges in court will almost certainly be more than the assets. So A. you can’t afford American justice, and B. Even if you can afford it, it’s basically just throwing good money after bad at that point.
After they have financially ruined you, with a very real prospect that your partner is going to divorce you, that’s when treason becomes tempting if certain US government representatives offers to make you whole plus a massive cash bonus.
And the worst thing with this is that it’s basically minimal cost to America. They are using your own assets to blackmail you. So there is basically no downside for them. Either you flip, or it’s a new Christmas bonus for them.