[Deo volente]

You missed the point. The argument is that the Church “can not back up” doctrine with Scripture, which is false. There are at least 2,000 Scripture verses at that first site I linked which support Catholic teachings.
There are many, many other sites, books, concordances, etc which are chock full of Bible verses defending Catholic teaching, or if you prefer, Catholic doctrines found EXPLICITLY in the Bible. There is also implicit evidence, of course, but the notion that the Church can not defend any of Her teachings using the Bible is false.

The papal encyclicals, letters, etc (hundreds written in the past few centuries alone) are saturated with Bible citations illustrating Catholic doctrine.

Your assertion that “Scripture backs up Scripture” is a truism, similar to saying the Encyclopedia Britannica backs up the Encyclopedia Britannica.
You've said nothing by it.

[presently no screen name]

You've said nothing by it.

Are you saying you don't know that the Bible interprets itself and Scripture backs up Scripture?

If you don't know that - don't tell me I'm missing the point!

You keep proving over and over - you don't let God's Word get in your way - you toss TRUTH aside for some church teachings.

Jesus built HIS CHURCH on HIS WORD ALONE! Man made doctrine and pomp and circumstance are not a part of it.