Okay but setting aside the details of the truth about language, having a degree should not give you or anyone carte blanche (definition: “complete freedom to act as one wishes or thinks best”) to harass strangers on the internet. I know nothing of the incident you referred to, only what you said here. Also btw I did not down-vote you.
Regardless of whether a mod is a literal child or not, that is the “role” that they have stepped up to fulfill - to be a curator of whatever community, or instance, or whatever - and should that not deserve at least a modicum of respect? i.e., if you stepped up to fulfill that role for your own community, wouldn’t you want people to respect you in turn? From your words, you obviously do, so why not offer it preemptively?
Especially as a psychologist: you better than most people know that you get what you give, especially when dealing with children.
They likely were saying that the truth of whether you were a psychologist or not was irrelevant, what matters was you breaking the rules of that community - b/c at some point, if truth is functionally indistinguishable from a lie, then does it matter, practically speaking?
Anyway, I hope you enjoyed this food for thought:-).