Thats kind of my point though isn't it? If it was something any normal person would be willing to do, then we wouldn't see that many Syrians stay inside of Syria. I would expect there is a top controlling percentage that would want to stay because their interests are protected, but outside of that, why aren't they just leaving?

Because it's hard to do it, legally or illegally. Only people that are driven and open to accepting the high risk of relocating are willing to do so. Therefore, it at least says something about the people immigrating to the US; They are driven individuals who are willing to take chances for success. Thus better numbers in terms of upward mobility.