I'd say that "salvation by faith" is the central concept of Christianity, faith does not require knowledge per se, not in the way that belief requires knowledge.

"Even the devil believes [...]" as the author of the Epistle of James writes.

Christianity as revealed in Scripture is far less about rigid concepts.

On a side-note Catholicism demands significant orthopraxis, but that is heterodox wrt Scripture.

Your supposition requires a form of gnosticism that's really not Christian and is quite contrary to the Gospel IMO, heretical some would say/have said.