Only because you arbitrarily place the beginning of the Catholic Church at the Decree of Theodosius, while we consider the Pentecost to be the moment the Chruch was born. The term was first used by St. Ignatius in 110 AD, in the same sense we use it today.
Yeah. Some Protestants imagine all kinds of silly things,
place curious fantastical constructions on all kinds of historical stuff . . .
too.