For me, after being over 50 years of studying the Scriptures, I still don't trust my personal interpretation of them. But then my teachable attitude causes me to assume that my interpretation of Scripture isn't perfect by any means, and I use a number of literary mentors to test and compare my interpretation with theirs. As a result I have discovered many valuable nuggets of wisdom from them which I would not have discovered if I depended on my own interpretation exclusively.
Therefore, when I read John Calvin, I assume that he has a better knowledge of Scripture than I do, because he was fluent in Greek and Latin, which I am not, although in my declining years I am learning NT Greek. Also, the early church fathers are a valuable resource because their interpretation of Scripture is closer to the New Testament writers and therefore not influenced by later theologies nor corrupted by the apostate church and its heresies. D Martyn Lloyd-Jones is a reliable expository commentator who gives another perspective on the passage of Scripture I want to study, and I have Charles Spurgeon's Expository Encylopedia that contains many good insights that I would never have thought of.
So, why re-invent the wheel, when it has already been invented? I decided not to go the same way as Joe Smith who didn't like how the Scripture was interpreted by those in his church, so he invented his own Scriptures called the Book of Mormon. Ellen White decided that her interpretation of Scripture was superior to everyone else's so she wrote her book containing the doctrines of the Seventh Day Adventist church. A fellow called Russell decided that all the commentators were wrong, so he, without any training in Hebrew or NT Greek go his team together, none of whom also had any background training in the original languages, and came up with the New World translation of the Bible which agrees (surprise, surprise) with Jehovah's Witness doctrine. Of course, the early Pentecostals were anti-academic, so they had their own individual interpretations of the Bible, and this is why there are a plethora of different ways of looking at the Gospel and the ministry of the Holy Spirit. That is why the Pentecostal and Charismatic movements are so divided into many different "Spirit-filled" denominations, each saying they have the truth over and above the others.
So, in the light of all that, I would think myself quite arrogant if I thought that my personal interpretation of Scripture is superior to everyone else's.