It's possible a lot of people would like to leave but can't. Also, some people would like to return, missing the cultural aspects of the country they left behind or their families, but can't because they're unable to sustain themselves there, they need to continue helping their families economically and depend on the higher wages of where they're residing, or they're afraid because it's dangerous.
Any number of things may be true. But one cannot sensibly infer those things from this sample of people that is very far from being a random sample, but is actually a heavily selected sample. If you're really interested in the state of things "back home", don't seek out a group of people who are very likely to be slanted toward having a particular view (whether that view be positive or negative), and when they express that view conclude that all must have that view. All may have that view, but to conclude that it is actually the case, based on such terrible evidence, is totally absurd!
