We should take care of ourselves is another.
But, I think those things involved in the "social contract" are given a pass. It is my understanding that the "shouldda, wouldda, couldda's" that play a part in self berating or second guessing etc are the ones that are harmful, and that we "should" let go of.
There is little which is absolute. (I think Don would agree with that statement). So, *some* "shoulds" remain, I believe.
Just my thoughts here; I don't speak for Don, of course.
Shalom!