Am I alone in finding any of this news? I dropped out of academia almost 20 years ago (best decision I ever made, also one of the more difficult ones) and it was clear then to anyone who could do simple arithmetic that most of us (post-docs) wouldn't get faculty positions.
Yes, definitely Not News. When I went off to investigate grad school (in astrophysics) 25 years ago, departments I was applying too explicity warned me "look, odds that you'll get a long-term job in the field are slim if you go down this path". That's academics warning away potential customers of their grad programs: so the problem was bad enough even them for ethics to trump self interest.
Nor can you predict what will be in demand when you graduate: academia is a fickle beast, and fields go in and out of fashion in less time than it takes for the typical PhD. So study what you love, because you love it. That way, and only that way, will you win.
This! In spades (and, this was exactly what those people telling me there were few jobs said next). It happened to work out for me (sort of, I do experimental particle physics now instead of real astrophysics).
But even my friends who didn't get as lucky as I did aren't unemployed or flipping burgers. If you can get a PhD in astro- or particle physics, you've got some useful skills that transfer nicely to working in the real world. Most all of which pay way better than being an academic. So again, my career works only because I love it: not because I wanted to get rich.