As a therapist [rtd.], the psychological side is interesting to me, is highly potent, and may well be behind many disagreements.

All I mean is, just bear in mind the possibility that what may be behind your disagreement is that some involved may have a psychological block [or an 'interest=to=defend' block] which common sense reasonable discourse may be unable to deal with.

For example, see Cognitive Dissonance on Wiki.

Thus what's soooo obvious to one may not get on the dial of another.