The word-for-word literal English translation of the Greek for "2 Peter 1:20", as found at Biblehub.com is:
"This first knowing that any prophecy of scripture of its own interpretation not is"
Where do you see the term "the prophet's own interpretation" in the Greek for 2 Peter 1:20? (Hint: The term "the prophet's" isn't there in that Greek Bible text, "2 Peter 1:20". That was not in the Greek, but was added in your English translation shown in your post #298.)
It is plain that your so-called "Greek translation" is simply not accurate, CynicalBear. It has been creatively doctored up, with a phantom phrase added to the English "translation" you posted, which simply does not appear in the Greek text. It is bogus, with those words "the prophet's" shamelessly inserted into that Bible text, just like the Jehovah's Witnesses insert various things in their own "New World" translation of the Bible not found in the Greek, to subtly change the meaning of various Bible texts, in order to try to add false support for a false position.
Now here are some common Protestant translations of that verse. (You may want us to believe that you are a better translator than all the teams of English translators who translated all these Bible translations, but I'm certain that nobody here believes that for a split second, and I'm pretty sure we never will CynicalBear. At least the people who translated these English versions of the Bible, didn't try to insert imaginary phrases not found in the Greek texts for "2 Peter 1:20".)
Some Common Protestant Bible Versions Of "2 Peter 1:20"
"Knowing this first, that no prophecy of scripture is of private interpretation." - 2 Peter 1:20 - American Standard Version (ASV)
"Knowing this first, that no prophecy of the scripture is of any private interpretation." - 2 Peter 1:20 - King James Version (KJV)
"But know this first of all, that no prophecy of Scripture is a matter of ones own interpretation." - 2 Peter 1:20 - New American Standard Bible (NASB)
"First of all you must understand this, that no prophecy of scripture is a matter of ones own interpretation." - 2 Peter 1:20 - Revised Standard Version (RSV) - Protestant Edition)
(It is always a good idea to stick to the truth.)
(And, by the way, the nonsensical claim that the Catholic Church "tries to keep people from reading and understanding scripture" is also blatantly and grievously false, as any Catholic here will be able to truthfully confirm for you.)
2 Peter 1:20 this first knowing, that no prophecy of the Writing doth come of private explanation for not by will of man did ever prophecy come, but by the Holy Spirit borne on holy men of God spake.
The "holy men" there were the prophets. It was the Holy Spirit from which the explanation of those visions came. It was NOT talking about "interpretation of scripture".