Since we are ex Catholics, let me give my opinion. As far as I know, the Catholics will try to tell us, that having assurance of salvation, makes us guilty of the sin of presumption. It's horse hockey of course, and I am not sure if the Catholics link presumption to any other issue.
My opinion is, deep in their hearts, they have NO assurance of salvation. They must wait till they die, to see if they attain Heaven. If people wait till they die, to see if they attain Heaven, it's almost a 99.9%, iron clad guarantee they will end up in Hell. Just my opinion, but I think most Catholics are inwardly jealous of our assurance of salvation, and wish they had it too. Since they don't, they double down on the issue, and call it the sin of presumption. That is my best educated guess, as an ex Catholic. 😱
Right on - right on bro’