Idk, first the focus on body modifications in the context of what a transhumanist is is a bummer, I always thought imoroved thinking made more sense as the initial goal. And second, how do you determine what is someones authentic self, if theyre pursuing that or if theyre taking advantage of body mods to be pervy or manipulative or do xyz bad thing. Its entirely subjective. Not to say there arent solutions to separate safe mods from unsafe, just that the authentic self feels like too fuzzy a thing to use sincerely, at least I see it as some bundling of your personal values that could be cancerous as far as I know :)