Don't confuse quiet with calm
We tend to look at the state of others in relation to ourselves, not in relation to who they are.
If we suffer anxiety and feel ourselves acting out, then we might notice the sombre presence of a friend as being an enviable state.
That friend might be naturally Kapha and their vikruti might be in a state of denial or shutdown, which can be their default when stressed. They are not calm, they have turned themselves to stone.
Kapha's natural state is loving, not inert.
Vata's natural state is joyful, not reckless.
Pitta's natural state is discernment, not judgement.