The "Fundie Baby Voice" is a typical voice style of women from fundamentalist Christian communities. There, women are raised from a young age to perform what fucking woke ideology calls the "traditional female role", which is really nothing more than the Natural Order of Things. In other words: have children, handle household chores and caregiving duties, obey her husband, and shut the fuck up. And that tone of voice is simply the NATURAL (not artificial) vocal symbolization of that education in feminity (not feminism), docility and submission to men. Recently, the "Fundie Baby Voice" has become fashionable among some female influencers (and their followers) who "play" at being tradwives or who aspire to "catch" a man who will support them. That's why they "imitate" that type of voice in a twisted way.