It looks like this is another thread of the same people saying the same things. I assume that yours was a sincere question so I’d like to try for an answer. Disclosure, I am a Fundamentalist Baptist pastor in ministry for approximately fifty years.
The OP seems to think there is something obviously wrong with the idea of the perspicuity of Scripture. To a person of his mindset it is inconceivable that the Bible could mean what it says.
Contradictions? If one assumes there are any in the Bible then perspicuity is falsified. Spent some years studying every single supposed contradiction and many other so-called discrepancies alleged in the Bible. It is God’s inerrant word! Furthermore, many of the men making those allegations know they are lying.
Creation? If science falsely so-called has proven evolution and millions of years and the stories of Genesis 1-11 are myths, then the doctrine of the perspicuity of the Word is falsified. Whatever tricks you use to explain away six day creation can be used to explain away any doctrine including if you wish, the bodily resurrection of Jesus. If someone really wants to know about this subject, God has provided a wealth of resources verifying Genesis. Most people just sneer and say “Fundamentalists are anti-science” and let it go at that. The notion that Genesis chapter five has some “spiritual” “metaphorical” meaning is silly, but that is what you must say if you insist that the earth is millions of years old. If perspicuity is untrue, then anybody can make up anything so there has to be some church claiming to have the final say. All the comments in support of the OP make this very assumption.
Calvinism? The plain reading of Scripture is that Jesus died for everyone. The Calvinist doctrine of the limited atonement is the most obviously unscriptural of the five points of tulip Calvinism, and when Presbyterians define perspicuity of Scripture they are always careful to point out that the Bible doesn’t “always” mean what it seems to mean. I became a Baptist though I was saved and raised a Presbyterian, by reading Lorraine Boettner’s classic book, “The Reformed Doctrine of Predestination”. I could see for myself his folly in trying to explain away the clear meaning of 1 John 2:2.
Not only did God write the Bible, He did a good job of it!
And we all anticipate a blind squirrel wandering in and finding a nutor two.
I have no problem challenging error over and over again. Do you?
The Pharisees were Jesus' most bitter and implacable opponents. For them, God is mostly one who makes demands - those elaborate but petty rules that must be kept. (sounds familiar, huh?)
In the Gospels, Jesus challenged them most frequently, not holding back. I will defend the Truth and contend with such people, too. I am operating under orders: "Go therefore and make disciples..." Matthew 28:19
I'd rather be in the battle every day than standing by and watching.
But I do whole-hardheartedly agree with your conclusion:
"Not only did God write the Bible, He did a good job of it!"