So, I’m a student of the Psychology of Religion.
Scholars have done studies on the developmental stages of faith—meaning there ARE stages of faith from less mature to more mature. Early stages rely on an external authority. They are very rules-based and about doing things “right” according to the authority and the rules. There is usually an innocence or naïveté because folks don’t know better, they can’t be more progressive yet, and they absolutely want to be “saved".
The hardest shift is between level 3 and level 4 spirituality (according to James Fowler) when a person shifts from an external authority to an internal authority, and from a head-based religion to a heart-based religion. (Richard Rohr simplifies it as early life—stages 1, 2, 3—and later life—stages 4 and up.) The people around them who are still in a rules- and authority-based religion are particularly threatened by their shift and do not understand it. I liken it to learning to swim. People who have not learned to swim cling to the side of the pool and call out in fear at their loved ones who are starting to let go and swim in the water.
We all have a tendency to be drawn into the need to be right and "win" arguments. We value a sense of cognitive security and don't like perspectives that threaten our foundational narrative of how life (God, "salvation") works. Arguing with someone about how they are wrong is rarely effective because they are so emotionally invested in "staying alive" (maintaining the reality they have known and trusted until this point).