We rightly put the number of individual Catholic denominations at millions, since Catholics around the world choose what they believe regardless of the positions of Rome - making their own truth.
Not necessarily so. We are obligated only to believe DOGMA, nothing else. DOGMA is explained in our religion classes, catechism, sermons, etc. There isn't THAT much DOGMA.
By the way, how do you KNOW that Catholics "around the world choose what they believe..."?? Do you have a crystal ball or something? NO ONE knows that except God. Or do YOU have some special ear to the Almighty OR to the minds/souls/hearts of all 1.6 billion Catholics [Google] around the world?
Who makes his own truth? I don't. I doubt that you do either.
God bless you and yours.