Theology scholars like to write ‘Introductions’ to things, and they like to talk about the ‘Problem’ of other things, such as the Problem of Evil or the Problem of God. They do not usually write on anything useful or testable like the Problem of Trapped Wind. Even though, you would think, it would be a good exercise to start on something smaller before reaching out straight for the Transcendent.
How are these people appointed? It turns out that theologians appoint each other. In effect, they mark their own homework. This is convenient for them because words/pontificating/opinions (NB: exactly what I am doing here) comes cheap, whereas facts come expensive and the budgets of theology departments do not generally run to them.
I have a particular problem with Introductions. An Introduction, for example to a book of the Bible, is a long compilation of what earlier theologians have said about that same book, selected according to the prejudices of the current writer. Introductions usually include a discussion of authorship. And Introduction-writers will exercise themselves with things like The Problem Of Isaiah (how many people wrote it); or the Problem of John (that the writer of the book of Revelation, called John in the book itself, is a different person from the author of the Book of John, whose never calls himself John in the book, but implies that he is.) With us so far?
We can cut through this. No theologian should be allowed to opine on the authorship of books of the New Testament without first being tested. This is easily arranged. Give them some books in various genres, written by livibg authors, and get them to theorize who wrote what. If you pass you, you get the job, if you fail, out you go, you charleton, to the World, where there is wailing and gnashing of teeth and the need to work for a living.