When you look at the differing opinions of Catholics just on these threads alone, you can see the fallacy of the unity of the Catholic church.
So the Vatican has an official doctrine to fall back on. Big deal. Lots of denominations have that.
There are as many different flavors of Catholics as there are Catholics. The church acknowledges the different rites to begin with, but when it comes down to the parish and individual level, the teachings vary widely.
We can see that in the disparities among the Catholic universities, the Catholic publishing houses, the Catholic nuns (the ones who support abortion), and in different Catholic countries.
You can see it regularly on FR in the different threads where some bishop or cardinal makes some proclamation that contradicts Scripture or the Catechism and the FRoman Catholics go into contortions excusing, defending, and throwing the guy under the bus. Just because some bishop says something doesn’t mean it’s official Vatican policy. Except for the complicating factor of the guy being an ordained Catholic priest given a high level of responsibility.
There are many third world primarily Catholic countries where local superstition and animism is mixed in with the Catholic beliefs. Everything from the voodooism mixed in with it in places like Haiti and the Dominican Republic to the superstition that I witness your average Joe Catholic on the street display.
The idea that Catholics are united in the beliefs of their church is one of the biggest fallacies that the RCC puts forth.
I agree they are simply not the united front in which they claim....and that is without question. Which then begs the answer of why they continue to claim this? Protestants differ yet their foundation in Christ is solid for the most part...but we do not base our “fellowship” with one another on a church..rather it is directly in the heart of Christ. And some Catholics do as well but it seems to always have all this other “stuff” they believe they must adhere to. I don’t think that is going to change no matter the truths which are clearly revealed to them where they’re in error.