yes she can simply date a subhuman, making her lookist by blackpilling her would just raise her standards while her looks stay the same(looks maxing doesn't work, your looks standards raise more/faster than looks maxing could ever give you)
Anyways, i don't believe in changing yourself to fit societal expections no matter what. I want her to sacrifice herself by not looksmaxxing (looks maxing means the state of developing BDD, becoming more lookist, dissociating from yourself, running away from your physical body, parasuicide(inching closer to suicide)).
The implication of being a narcissistic looks demon is taking looks souls, sadly. There's not much more to tell you if you accept that