That means you weren't around for the dot-com bust in 2001 or so. Yes, things are good right now but the situation can go south very suddenly and with very little warning and stay bad for several years.
EDIT: In hindsight, I see the irony of that statement. But I also know we don't get involved with the sort of schenanigans that hurt firms in the last crisis.
Even if your present employer is stable, it seems likely that tens of thousands of us will be competing with you for your next job, and bidding down its wages.
In making high-dollar salaries, we're doing better than most, but don't confuse $150k Senior Engineer positions for 25-year-olds at 5-year-old companies with long-term stability.
I also took out a sizable chunk of student loan debt for my degree, and have paid it off already, so now I'm debt-free and employed. Nearly every one of my friends and peers are in a similar boat. No apocalypse here, yet.
I also grew up in a non-nuclear family with a single mother and 2 siblings.
Most of my friends in a major field of engineering or computer science are just fine as well (IT-degrees and almost comp sci degrees don't fair as well).
The world is not as dismal as it may seem for millenials. It's just that demand for STEM +CS continues to grow while the demand for other fields is stagnant, relying on people leaving the workforce to create new openings.