I am Christian btw, but I support bringing historical and documentary rigor to theology. I also haven't actually doubted anything, at least not of Christ. I've just characterized Paul's gospel and mission as coming from a private and separate revelation, unlike the gospels and missions that the original apostles received.
The point that I made based on that is that it is strange that a lot of the theology of Christianity as it develops centuries later is derived more from the exceptional and privately delivered gospel of Paul, rather than from the gospels of the apostles of Jesus when he also held a historical human form.
I think there is also an obvious scholarly reason for this that doesn't even require belief, which is that Paul's writings are the closest documents we have to the time of historical Jesus. However, that also gives reason for us to be cautious in hanging major theological positions on specific sections in Paul that seem absent from or in tension with the synoptic gospels.
Paul is, in this terminology, also a prophet. He explicitly says the revelation he tells is not of human origin, and so not passed down to him through e.g. the ministry of one of the students (apostles) of the prophet in question.
It strikes me as unusual to have so much of the theology coming from someone who simply claims private revelation but is not the prophet in question and when the prophet explicitly chose disciples and set a ministry for them.