Christian fisher-persons looking for yet another route by which they might justify their obsession might find an ally in the Reverend Bruce Milne, who penned a commentary on the gospel of John for the The Bible Speaks Today series.
In commenting on their Galilean fishing trip recorded in John 21, he notes that the disciples of Jesus have taken it on the chin over the centuries for their decision to go fishing so soon after the resurrected Jesus had commissioned them to be sent as he had been sent (John 20:21).
Milne is sympathetic, which causes me to picture him with his own pole in his hand:
“It has also to be said that in terms of their psychological and emotional well-being a fishing expedition back in the old familiar surroundings of the Sea of Galilee was therapeutically ideal. The last few days had been an emotional roller-coaster. In a matter of a week they had been lifted up to the giddy heights of Palm Sunday, sent spiraling down into the utter depths of despair on Good Friday, and then been swept up again to the heavens by the glory of the resurrection. A good night’s fishing was probably just what a doctor would have ordered.” (310)
There you go. Biblical support for therapeutic fishing.