Agreed. This product seems pointless because nobody's interested in a proof of authenticity (except maybe in certain legal niches?)

I take pics for me and my friends and family, and AI has almost zero impact on this (although, face swaping is lots of fun, and everyone understands it's fake and a joke).

Edit: also, and more importantly, the question of authenticity is moot. The point of art in general is to say something / make a statement, and certainly not to produce a faithful representation of the world. Anything that's not an exact copy (which is hard to do if you're not God), has a point of view, which gives it value.