More than that - I think that people who are grieving may not know how they "should" be grieving. Consider that some cultures (literally) perform grief by - for example - wailing at the grave. Others may wear a particular colour of clothing, etc.

You can say to yourself "I am grieving" but still have the nagging suspicion that you are not doing it 'right' in some sense. Similarly (I think) for many emotions - how happy should I be in this moment? How excited?

On the flip side, there are people who (seemingly) over-dramatize every event - but are they pretending, or do they really feel things that keenly? I suspect that most emotion is some combination of raw/organic emotion, and the more cultural/performative/learned emotional response.

It gets complicated, is what I'm saying.