That's too bad, but salvation is not based on one's knowledge of Bible trivia, and "salvation by grace" is not the same thing as "salvation by apologetics".
Both the Bible studies and discussions, and the hard-core apologetics, are out there. You have to expend a little effort to get them, but they aren't hidden and aren't hard to find.
What about "thy Word I have hid in my heart, so that I may not sin against thee" (NASB: "Your word I have treasured in my heart, That I may not sin against You.")?
I am talking about someone who reads the DaVinci Code and then says "well, it could be true that Jesus ran away with Magdalen instead of dying on the cross..." and does not understand why that would incontrovertibly mean a rejection of Catholic belief.
Yes, this actually happened, and yes, the woman in question went to Catholic school and even a college run by and taught by nuns.
Maybe it is an outlier, and surely just an anecdote, but my original point stands: "If you are going to be a serious Catholic (taking canon law, etc. seriously), expect to be lonely".