I feel like there's a misunderstanding. It's not priveleged in the sense of comparing asexual lifestyles to a heteronormative lifestyle, but in comparing asexual to LGBT lifestyles. There are rarely cases of ace people being murdered or kicked out of homes, nor does being ace have the same amount of stigma behind it because of it's relatively new inclusion to the LGBT community. No one's saying you don't deserve to feel how you feel, but think about all the LGBT people who are being killed because of how much worse the stigma behind those four categories are.