Did you know that the bones of the thumbs of someone crucified with nails through the wrists pull back into the palm when the person is taken down from the cross? 14th century artists sure didn't know this (look at all of the painting of Jesus being taken down from the cross that were painted during that period) and yet the shroud, when using the photographic negative, clearly shows this sublimation effect. Many, many facts like this provide evidence that this is not a work of art, but something else entirely. Is it the shroud that Jesus was wrapped in? I don't know, but my faith isn't threatened one way or the other, so I'm willing to examine the evidence.
(By the way, the carbon dating done on the shroud has been shown to have been done on a section of the shroud that was repaired when it was damaged in a fire in the 14th century. The carbon dating shows nothing more than the fibers tested came from the 14th century.)
You point deserves reiteration.
Whether the Shroud is the burial cloth of Jesus is of no moment to the Christian faith; rather, it is of utmost importance to the athiest faith.