I’m not saying it’s a good deal for anyone capable of getting a doctorate. It’s clearly superior to being an adjunct though. They’re low paid, insecure, highly qualified labour. Once you have a doctorate and you have two years on the job market without a tenure track job you’re done. You’re never getting a tenure track job and you’re better off getting the he’ll out. There are some exceptions but assuming you’ll beat the odds is a losing bet. Even those two years of adjuncting, doing teaching and research and hoping is a losing bet but it’s not an insane, fallacious waste. Sometimes people make it out. For all practical purposes no one makes it to tenured Professor, of whatever rank, after two years adjuncting.