Acharya Prashant explains that conflict in relationships is fundamentally rooted in desire and expectations. He observes that relationships with parents often remain smooth because expectations are low, particularly for daughters who know their stay is temporary. However, in marriage, expectations escalate significantly, leading to disharmony. He clarifies that individuals often do not relate to each other as persons but through the institution of marriage, which imposes specific roles and obligations. For instance, a father-in-law has expectations not of a person, but of a 'daughter-in-law' as defined by the institution.