There’s a second theory, not mutually exclusive, about the frozen job market having to do with resentment from corporate leadership about the sudden surge in labor power in 2020. Someone (maybe @jenniferplusplus?) referred to this as a “captial strike.”
I’m not sure how much economic sense that theory makes — but I am sure that corporate leadership is impulsive, petty, and irrational, and frequently does things that make no economic sense. I can’t elucidate the theory well, but it’s thing I’m keeping my eye on.