Humor lightens the load in any given circumstance.
True enough.
But some flavors delivered in some manners in some contexts come off very cruel and unfitting. Not on this thread, to my mind. I've been rather comfortable with the black humor on this thread. Perhsps too much so.
But humor can be a hazardous thing wrongly or poorly done in some situations.
Making a joke about mothers eating their own and aborted babies, for example, in front of a mother who just had a still birth would not be very tolerable at all, imho.