Right, but what happened between 18 and 33. At some point the author must have realized "the system is fucked" but decided (for multiple reasons) to risk continuing to work and live with the US.
It's one thing to attend university for 4 years, get a job and then head home. Quite another thing to base/commit your entire life/career in the US without a clear path to citizenship.
I'm not saying the author should "suck it up" but rather it seems many take this risk, knowing the dangers and therefore shouldn't be surprised or shocked to eventually have to leave (given a gap in employment)