I'll note again that nowhere has it been alleged that the content has been changed. Until I see some actual evidence that it may have been changed, I currently simply feel that there is no reason to think that it has. It seems to me that there is nothing wrong with simply making a picture clearer. For the record, the "burn" feature in Adobe Photoshop does not add anything; it simply uses what is already there and tones it down.
Okay, why not release the original photo in its "unenhanced" form?
Because it would probably never make it to print, since it lacks "substance."