Catholics have some nerve, don’t they? They think that they can invent traditions and put them over the teachings in the Bible. They genuflect and make the sign of the cross and pray the Rosary even though those are not in the Bible! How do you dare do that?
We Catholics don’t think tradition is better than the Bible, we believe the Bible is part of tradition; but not the whole thing.
Catholic tradition is broken into two parts, written (Bible) and unwritten (not in the Bible but written in the Catechism or somewhere else most likely). The first tradition was the unwritten one. Yep, it came first. The unwritten tradition led to the selection of the books that now make up the New Testament. These books were picked specifically because they conformed to unwritten tradition.
Unwritten traditions have at least an indirect reference in the written tradition. For example, the Tradition that Mary was immaculately conceived (conceived without original sin) comes from the angel’s greeting to her “Hail, full of grace.” If she’s full of grace, can she have any sin? Gabriel didn’t say “Hail, 7/8 full of grace and 1/8 full of sin.” That would be what we call an awkward moment in Biblical history, I think.
The Bible doesn’t specifically say she was conceived without sin and never sinned while alive but it alludes to it.
Another Tradition is that Mary was assumed body and soul into heaven. This isn’t in there either, but the two prophets in Revelation 20 were. So was Elisha in 2 Kings 2. So other people were assumed and it doesn’t say Mary wasn’t assumed and since Tradition says that she was then what’s the problem?
Minor traditions like genuflecting can change from time to time. It’s common in the US but maybe not in another part of the world. Most often they’re just a sign of respect. We believe that the king of the universe is in the tabernacle at church and genuflecting before the king was a common practice in the Medieval ages so we just kinda’ keep it up. The Bible doesn’t say it’s bad so we’re not contradicting it.
In short, Catholics never choose tradition over the Bible. We always choose both, since the Bible is a Catholic tradition.