That may have been true 10-15 years ago. For someone with either experience or a degree, most places pay 90k+. A senior engineer (as mentioned in the blog post) would easily make twice that.
Sure. As mentioned, I know people that make the salaries I quoted (who have both experience and degrees), and that's not something I plan to argue (because it's a fact). In my opinion they could make more if they really wanted to, but that's orthogonal to this discussion.