Then I'm afraid you've been misinformed. On many matters of Biblical interpretation, the Church permits a variety of interpretations, unless they conflict with authoritative rulings. For instance, the "interpretation" that the universe is the result simply of random chance, with no action of God's, is not within the bounds of permitted opinion, if one claims to be teaching the Catholic Faith.
For some areas of Scripture, the Church has determined that one interpretation is accurate, and others are erroneous, but these cases are far fewer than those for which various opinions may be held.
That sounds a little bit like "you are allowed to have an opinion unless it disagrees with my opinion". But whatever. I'll take your word for it, and the next time a Catholic friend gives me a hard time for "interpreting the Bible on my own" I will pass on what you said (I assume you are Catholic).