ability to choose one's path and learn and grow from the choosing. It is not about culturally and / or religiously adapted versions of relationships, and what is considered appropriate with regard to relationships, as that concept has been in flux throughout the history of all religions (ie Polygamy in the old testament, and early LDS church, and even age for marriage). However, it is when basic principles of decency contradict the concept of agency that the source of that contradiction should possibly be called in to question.
For example, some find it hard to reconcile how taking a person's life like Laban in order to obtain some brass plates (that God should be perfectly capable of revealing to a prophet like Nephi), is in keeping with honoring Laban's agency to continue to choose good and evil, even if he chooses evil ultimately. The same difficult reconciliation happens for some when contemplating how it is consistent with agency for God to tell Emma repeatedly in D&C 132 that she must accept polygamy (after being lied to about it) or BE Destroyed. Most would find it hard to exercise agency if they were in a state of DESTRUCTION.