Fair point.
I guess there is a disconnect between the "Low Church" sensibilities of most US Protestants (to use an Anglican term) and the fact that the visual language of "High Church" is compelling in visual storytelling.
"Low Church" is centered around the belief that one does not need vestments, grand cathedrals, etc. to connect with God---one just needs faith and maybe people to guide you on that journey of faith. But it's more compelling in movies and TV to display visuals of faith that are totally different from the outside world--the kind you find in Catholicism, Orthodoxy, some kinds of Anglicanism, etc.
I've noticed this is a thing in Japanese anime: any representation of Christianity = Catholic, with nuns, priests and Gothic cathedrals.
Amusingly, one notable exception to this is
Hellsing which depicts a vampire named Alucard (spell it backwards) working for a British government organization dedicated to fighting supernatural threats called the Royal Order of
Protestant Knights and includes a storyline where they engage in battle with militant priests dispatched by the Vatican. Admittedly, besides the name there is nothing particularly Anglican about the organization unlike the Catholics who are depicted in clerical attire.
A lot of anime which depicts Christianity are set in medieval Europe and 19th Century France/Italy/Germany or fantasy settings inspired by them which probably encourages this.
