I know, but the way it worked in Hadriel was that 'home' was where you go if you disappear in the random way that people did. That's probably the case here too, and the only way to avoid that is to know how coming and going works and how to control it.

[So for people who have nothing to go back to, or know what fate awaits them when they return, the need to solve the mystery is much greater than for people who'll simply go back to a life they want to return to if or when they disappear.]

That's very likely, that people are in survival mode, but we can't get out of that by being so lost and only able to react to what happens. Being able to do something about our situation helps.