It’s an old saw by now, but I’ll say it again anyhow.
Whether or not the Turin shroud image represents a genuine supernatural event, we would all do well to remember to revere and put our trust for needed eternal salvation in the Savior, recorded for all posterity in the Bible, that many say the Shroud depicts.
Yes, they can debunk all they like. Do they think it’s going to change anyone’s faith? If it does, they had none to begin with.