Others observe that Luther UNspun some RCC spun dogma..
Who is correct?.. Depends on your observation post.. I suppose..
No. The fundamentals of Luther's theology are not supported by plain reading of the scripture. They are all "don't read this book", "that passage does not mean to say what it says", "this word should really be inserted here".
I admit, there is a certain superstructure in Catholicism, what we call traditional or magisterial teaching. If one wanted to avoid it and build a sub-faith based on the Bible alone, well, he would have to find "Bible alone" in the Bible if he were a logical man, but that would be an intriguing and perhaps even worthwhile exercise. But this is not what Luther was about. He simply lied about the content of the gospel.