They have to tell us (this is their belief), this way they can rest at ease knowing that they Did tell us. It is not their fault if we were too thick headed to listen.
I do not think these are humiliation rituals, rather I think this is just 1 format they use to tell us.

Hepburns and their co-stars. Even a skeptic should be able to spot this . This is still the case in hollywoods current asshats