>>Absolutely nowhere in the Bible are we told to pray to Mary, worship Mary, or make shrines of her.<<
Absolutely, it's nowhere in the Bible, quite the opposite is true.
And that's the very reason for knocking "sola scriptura", because if you have an authority outside and superceding it, the you can challenge or ignore what it clearly states. Oral tradition is above the written Word, and oral tradition in many cases is in direct oposiition to the written Word. If oral tradition is not accepted, then you have to deal with the written Word and that can create serious problems with your theology.