Hitchens was a badass purely just for his treatise on his own mortality during his cancer battle, even while every one of the bloated evangelical pit bosses that held him as a boogeyman crowed continuously about how he'd definitely come crawling to God NOW
–- Update From New Post Merge ---
are you sure this is a part of Catholic doctrine? I'm sure it isn't. God is merciful. For example in Catholicism, every person, who hadn't known Christianity, but nevertheless led good life is going to Heaven. That is part of the doctrine.
People who rejected Christ are potentially going to Hell. That means there is great danger of them going to Hell, but it's not that we know this for sure.
In Catholicism, religion, that has best chances to take you to Heaven is Christian Catholicism, but that doesn't mean that if you believe in something else, you won't go Heaven.
God is Love itself. Person's sins are nothing compared with Gods Love and Mercy.
It does have to be genuine to actually work. That's like most basic requirement.
If the nuns love trotting out it can safely be called part of Catholic doctrine. Catholic guilt is a thing for a reason!