Sure, but where do they get their second tech job? Site accessibility engineer is not a common job title/position that I know of. Without some of those skills you mention, if not the corresponding formal education, that seems like this person is set up to fail soon, unless companies really start taking accessibility seriously in the next few years.
I dunno; if they're like most developers I know, they'll end up picking up a hodgepodge of skills that they missed in the bootcamp, which will let them plump out their resume.
If they can't figure out how to write their resume after they've had the experience, I don't feel too bad for them.
Accessibility consulting pays bonkers money these days due to the demand; even the a11y places like Deque and Usablenet are being asked for on-site a11y practitioners and they can’t find enough of them to refer companies to.
From reading the other comments in this thread, it seems that companies are starting to take accessibility seriously, and an experienced site accessibility engineer will not have any issues getting another job.