Why is realism said to be a reaction to romanticism?

(Credits to Quora)

Because during the Age of Enlightenment humanity emphasized nature and emotions, more subjective to the essence of being as far as love, life, transcendence, more celestial, abstract & extraordinary. Realist rejected these views and wished to depict the more harsh side of life, the inevitable suffering of the everyday struggle. In retrospect the aim of art is truth so this style was more becoming of the human experience then that which was exaggerated through romanticism a far more clerical time and our art reflected the times but like everything else in the universe we evolved.