Not everyone's had the luxury of saving for years and years. Some people just got into the industry (remember 'learn to code'? not to mention recent graduates), others had to work their way up through lower-wage roles (e.g. contracting) just to get to a place from where they could hope to save. Other people have family to take care of and can't just throw everything into their savings.
Even back when I had to make do with $400 a month I was saving. Live out of a van to save on rent if you have to. There's always a way to live below your means and save.
Of course there are exceptions, but I don't expect those to apply to anyone commenting here.