I think this is a fair question. The Catholic Church should be the Church that professes the one true Faith in unity. Unfortunately, the post Vatican II church seems to be missing this mark of Christ’s Church: unity.
Prior to Vatican II all “catholic” churches were....Catholic. No one would even see a need to ask the questions you have asked. And with Francis at the helm, the lack of unity is only getting worse.
It is beyond that.
My bride grew up in the Sioux Falls diocese. I grew up in Nebraska (I am a Lutheran). The Catholic Church in those locations was a “known” thing. We used to joke with them, argue with them, and unite with them against our hated enemies, the Swedes.
When we moved to Iowa, the culture shock for my bride was huge. From a faithful parish, to one that had enough abuse scandals that land was being sold off in dollar sales to “protect” it. From a place that believes in the 7 councils, to one where the local priest says, on Christmas, that Jesus didn’t know he was God till (Maybe) after the crucifixion.
In other words, my LCMS parish is much more “Catholic” than the local Catholic church with the name on the door.