The RMAC was the equivalent of the Big Sky or less, today.
Even rabid yewt fans don't hang their hats on undefeated seasons that happened in their great grandpa's era, while playing for a conference that from the national viewpoint didn't even exist.
They own the overall record, but no need to try to make more of that than simple fact that fielding a football team was never a priority at BYU for several decades.
Frankly, the only thing that counts is the results on the field yesterday. Everything else is just fluff.