Will a subconscious channeling for my client [name withheld] be helpful in addressing his porn addiction? Is this truly a problem?

It will be helpful because it will resolve some inner conflicts that are trauma-based that are confounding things and adding unnecessary emotional negativity, in addition to his inner misgivings about his thoughts and sensations. So a session would be worthwhile to clear some deadwood, so to speak and smooth things out a bit. It will help the progression of his healing, and so is not a distraction or ill-advised, because it is working on something that is unnecessary to address that may be taken care of naturally through other healing that is ongoing. This will add to the picture and accelerate the healing and will be informative as well.