This is probably a stupid question but don’t understand it because it keeps happening more now than ever especially since Diddy. If I take my girlfriend to a restaurant she does not want to go to across state lines is that sex trafficking? Since we will probably have sex later?
And honestly the immigration laws thing is a stretch, although you’re right to mention it as a common definition. There’s a certain effort to associate all irregular migration with modern slavery, just as a rhetorical tool (and it’s bullshit).
Moving vulnerable people to a new country is definitely a common element of sex trafficking, but it has nothing to do itself with whether a sex worker is being coerced or not.