What if I give explicit permission to use my likeness but my lookalike demands it can't be used? We're both dead. Do my wishes not get respected because someone who looks like they could be my identical twin had other wishes? Whoever's estate has the deeper pockets?
See photography by François Brunelle. The similarities went past appearances too. Many of the stranger dopplegangers had similar hobbies and even similar personalities. So if an AI recreation looks like me, acts like me, and has the same hobbies as me that means nothing unless someone is trying to claim it is me (rather my likeness).