Atheists, tell me, a Roman Catholic: why should I become an atheist?

[Aoi Magi]

Does a old man, chosen by other fallible old farts, suddenly gain magical understanding of the bible to overthrow it's authority as "solo scripta" despite their whole faith relying on it? I don't really understand why catholics can believe the interpretations despite history repeatedly showing they are not infallible.
The senile old farts have thought themselves as gods like Pope Nicholas I declared that "the appellation of God had been confirmed by Constantine on the Pope, who, being God, cannot be judged by man." - Labb IX Dist.: 96 Can. 7, Satis evidentur, Decret Gratian Primer Para.
I mean after you have a "heretic" like Pope Honorious, or require reversals like Pope Zosimus reversing he predecessors pronouncements, how do you honestly believe that what the current pope is saying is truth and you won't be damned for following it by some future pope?