I have trouble seeing the difference as I think you can turn the variable value statements into empirical facts that map to a constant value. Say that cake->yummy->good, cake->icky->bad, death->icky->bad, death->yummy->good. Then the yummy->good connection could be questioned as a matter about the world and not about values. If a bayesian accepts sad news in that kind of world how come the value loader tries to shun them?