Why yes, when I ask who I am, I am indeed interested in objective truth, or whatever objective truth of the matter may or may not exist. What the relation actually is, between our sense of self, and the-stuff-out-there-in-reality. I don't understand why this seems so outlandish.

If identity really were up for grabs like that, then that just seems to me to mean that there really ain't no such critter in the first place, no natural joint of reality at which it would make most sense to carve. In that case that would be what I'd want to believe, rather than invent some illusion that's pleasing or supposedly beneficial.