You've not MADE a point yet.
The church at Rome has taught it's members that certain verses are Literal and certain ones are Virtual: symbolic if you will.
There has been NO evidence produced by her as how she determines which as which.
BECAUSE WE SAY SO does not impress Protestants at all.
I fail to see how her members; if they think logically at all; can fall for it.
Ultimately it comes down to a belief that This Earthly Organization Is Specially Spiritually Charmed.
Evangelicals aren’t comparing this to a vacuum, and shouldn’t even be comparing this to their own organizations. It is about the special blessed walk with Christ. This is what moved Luther. Luther didn’t make a fuss and eventually walk out over a bunch of abstract theory. He was positive that he had met Christ, and that Christ didn’t need and in some cases didn’t even want the doctrinal encrustations.