What are the point of tears when we are upset after adjectives they serve no purpose as we do not hold dust to clear?

What are the point of tears when we are upset after adjectives they serve no purpose as we do not hold dust to clear?
There may not be an independent physiological reason for tears of gloominess. However, in the context of human society, the propensity to demonstrate powerful emotions through such a dramatic physical process could be a trait that be evolutionarily selected for.
Try asking someone who have dry eyes. Tears also lubricate and wash away any allergens you encounter.