When automation happened historically, people whose job were displaced suffered a lot and eventually pivoted to different jobs. Having to relearn all of your career skills is already quite bad in practice, but a bigger problem is that it only works if you can learn the skills for job B before it, too, is automated. That'd require AI progress to hit a wall and stay there for at least years, ideally for decades. If this doesn't happen, then there simply won't be any white-collar jobs to pivot to, and shortly after that, no jobs to pivot to at all.