You're right. The Holy Spirit does allow for interpretation. That is the whole point of the Magisterium. It's why Jesus entrusted the Word to Peter and his successors. I cannot see how Jesus wanted there to be 31,000 different Protestant denominations, all believing different things. It only stands to reason that He did as He said and established one church headed by Peter and his successors. YOU may disagree personally with what the successors have said, but it doesn't make YOU right. I'll trust Jesus' words and trust in the successive popes over my own interpretation any day.
"It's why Jesus entrusted the Word to Peter and his successors."
There is no such thing as Apostolic succession. If there were, a Pope about to die would annoint a successor. Instead of that they've been assassinating eachother. At one time there were two Popes.
Jesus entrusted his word to all believers. "He that believeth and is baptized shall be saved; but he that believeth not shall be damned."
Notice the order of "believe" and "baptize". You have to be older than a newborn baby to do that. Also, this doesn't leave any room for Peter, Popes or Purgatory, which are all late human inventions.