Sure. Just try owning a house and raising a family on one salary like your parents did.
I am, thanks! Mortgage, 4 kids, one salary well below the median for our town -- and debt free other than the mortgage.
You can still make it work, and I'd say you can be as or more comfortable than your parents were thanks to technological, medical, municipal, and other life improvements.
No, you can't have two iPhones with data plans, an HD DVR cable subscription, a house you can't afford, and two car payments. But comfortable and raising a family on one salary? Quite possible.