If you want to fight Vicar Amelia and get the whole truth (that you could already have pieced together from the other routes, btw) from Rhea, then yes, you should. Also, people saying that BE characters "belong" in the church route are just wrong. You can make the argument that they have dialogue in the overworld when you talk to them each chapter, but that doesn't work, because every character has that.
"These characters belong in this specific route! That's why they have no dialogue in most of the cutscenes of that route!"
Like, what are y'all talking about?