Godrulz, I was a JW for about 25 years and I am entering the Catholic Church next Easter Vigil. The question was to ask you what church was Paul referring to?
In regards to 2 Timothy 3:16, that verse says that Scripture is beneficial, not sufficent. The bible never claims that it itself is the sole rule of faith. If it were, it would be self interpreting, which it certainly cannot be, since we have about 40,000 denominations in the Christian world today all claiming to have the truth and "we follow only the bible". The bible alone, or, Sola Scriptura, is an invention that came along during the Protestant Revolution and was unknown in the Christian world for 1500 years. The WTBS is the logical conclusion of this doctrine, for not only did they claim the bible alone (which you and I both know they don't do, which is what the original poster is getting at), but they then changed Sacred Scripture to defend their doctrine.
If find it intersting that you think that no church is on "par w/ scripture", since it was the Catholic Church that determined what made up the "biblia". Christ founded a Church (Matt. 16), which in turn gave birth to tradition, and that tradition then produced the bible. If God guided the Church in determining what was to make up the canon, it would naturally follow that that same Church would be the infallible interpreter. Christ promised he would guide the Church into all truth in John 16:12-15 and promised perpetuity in Matthew 16:18 and Matthew 28:20.
Can anyone read the bible? Of course. But can everyone correctly interpret what it means? The bible itself shows that one needs the living faith community that produced it to understand it (Acts 8:26-31).
May the Peace of the Lord Jesus Christ be with you always