Everyone who is in the USA and is not a Native American had ancestors who left where they were from. Often not under ideal circumstances, there where no guaranteed jobs waiting for anyone over here, just the opportunity for something better.
Best case I have something like 4th or 5th cousins in Europe. Not someone I can just drop into their lives.
The #1 concern of someone leaving a country, is whether or not the receiving country is actually a better place. It is absolutely critical to understand the culture of where you're going to, if you expect to evaluate how you're gonna live.