The Catholic Church teaches us unity

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Lutero:
But empirical evidence shows that Catholics do disagree on what certain doctrinal pronouncements mean.

But not to the point of disunity. The Catholic Church teaches us unity in those things necessary, charity in those which are not.

I've seen Catholics disagree on what Trent's canons on justification mean. On this very forum I've seen Catholics take radically different interpretations of Trent on penance and atonement. I even asked, given the discrepancy, what authority will tell us what Trent "really means"? No answer came. Your comment is so out of touch it beggars belief. Try again.

The Catholic Church tells us what Trent really means. It is not as though the Catholic Church stopped teaching after the Council of Trent.

Therein lies the Protestant problem. They believe that God produced a static piece of paper and they interpret it anyway they want to.

But God did not simply produce a static piece of paper. He also established a Church and commanded that Church to Teach what He commanded. Thus leaving no opportunity for the individual to misinterpret the Word of God passed down by Scripture, Tradition and Magisterium. Those who do, willfully disobey God's will and will receive their reward.

Why do you gratuitously assume your reading magisterial documents is fundamentally different from me reading a Bible?

Because it is. You read the Bible ALONE and so read it independently of anything that ever happened from the time of Christ.

But we read every Magisterial document, including the Bible, in the spirit of the Tradition and Teaching of the Church from all ages. 

The comparison is stark. To use your words, it is "fundamentally different".