The truth is that almost everyone in the world inherits their religion. The number that convert is miniscule and insignificant.
We take in our religious belief, we take in our religious identity, with our mother's milk.
So our religion is beyond argument - we just take it for granted - just as we take our mother for granted.
But you're a kind of motherless child. Constantly querulous, constantly fretting, worried that mother will go away.
But she's been here for two thousand years and is quite likely to stay.
But what would Catholic Apologetics be without converts like you and Cardinal Newman?