it's not to elevate me as all-important, but it's to limit what i say to my experience

Yeah, that. And this too:

pparently looking white must mean that i've not experienced racism, and that i have nothing worthwhile to contribute to a discussion about it because i am privileged

And I'm a quarter Spanish and an eighth Native American, but I experienced racism and prejudice for being white in a Hispanic neighborhood. I was not *brown enough*.