Apparently the Ethiopian eunuch didn't think so. When Philip asked him, "Do you understand what you are reading?", the eunuch replied, "Well, how could I, unless someone guides me?"
If you were right, Philip shouldn't even have asked the question. And in reply to the eunuch's question, Philip should have rebuked the eunuch for failing [ironically!] to understand the perspicuity of Scripture. "You ignorant man of little faith. How can you possibly not understand what you are reading? By your ignorance and self-doubt you are setting an example that will lead future readers to think that they need someone to guide them as they interpret Scripture. Don't you know that you have the Holy Spirit to guide you? Even the fact that I must now rebuke you will be used by future believers to support your heretical notion of needing a guide. Carry on and (as I shouldn't have to tell you) say nothing of your lapse in faith in the Holy Spirit's guidance."
-A8
And who was leading Philip in his instruction?
"And when they were come up out of the water, the Spirit of the Lord caught away Philip, that the eunuch saw him no more: and he went on his way rejoicing." -- Acts 8:39
Our disaagreement is that you look to men and magisteriums to guide you while Scripture tells the believer he is led by the Holy Spirit.
For ye have not received the spirit of bondage again to fear; but ye have received the Spirit of adoption, whereby we cry, Abba, Father. The Spirit itself beareth witness with our spirit, that we are the children of God: And if children, then heirs; heirs of God, and joint-heirs with Christ; if so be that we suffer with him, that we may be also glorified together." -- Romans 8:14-17"For as many as are led by the Spirit of God, they are the sons of God.
One of the primary functions of the Reformation was to restore a correct and Scriptural understanding of the indwelling Holy Spirit in men's lives which Rome all but obliterated then and now.