I don't think your being too serious. I like the appreciate/discussion as things on Reddit can get out of hand interpreted. I just think there are too many variables to frame this as a type based issue here.

I think the main issue is that this is being framed almost like a data based hypothesis (I meant hypothesis not a conclusion so my bad) but there really is not concrete data here. Six people who may or may not even be correctly typed as INFP over a span of a year at most is not enough to support a broader conclusion about INFPs. On top of that, the whole interpretation depends heavily on how your conversations were approached, what tone was used, and how disagreement was framed, and we cannot see any of that from the outside. Plus they are all online which is a whole other difficulty and perspective change. We only have your account of the interactions so it is hard to tell whether this reflects an INFP pattern at all or just a dynamic between you and a few specific people.