On a final note, assessing the contribution of Paul to our knowledge of the historical Jesus can be described as a balancing act. One the one hand, especially when we come to Paul from the Gospels, as – given the canonical order – we inevitably do, we notice that Paul does not give us any sort of full picture of the episodes of Jesus’ life. The question, however, is how surprised we should be by this. (As a parallel case, we can note the book of Acts, where the reference to the pre-Easter Jesus is comparable to that of Paul, yet we know that the author is neither uninterested in, nor ignorant of, that pre-Easter Jesus.)
(The Historical and Human Existence of Jesus in Paul’s Letters, in the Journal for the Study of the Historical Jesus, Issue 16.2, December 2018, p.212, my bold)
As if Acts could be silent about Jesus, why not Paul also?
The point is that according to the same game rules given by Mark, it is perfectly legitimate to expect that Paul breaks the silence about the historical Jesus well more than how Acts could do, since it is highly plausible to believe that the possessed gerasene was just (a Jewish-Christian parody of) Paul:
18 And when he was come into the ship, he that had been possessed with the devil prayed him that he might be with him.
19 Howbeit Jesus suffered him not, but saith unto him, Go home to thy friends, and tell them how great things the Lord hath done for thee, and hath had compassion on thee.
20 And he departed, and began to publish in Decapolis how great things Jesus had done for him: and all men did marvel.
19 Howbeit Jesus suffered him not, but saith unto him, Go home to thy friends, and tell them how great things the Lord hath done for thee, and hath had compassion on thee.
20 And he departed, and began to publish in Decapolis how great things Jesus had done for him: and all men did marvel.
(Mark 5:18-20)