She’s not grasping why thicker women have better fertility.

I’m 5’4” and when I’m 120 (when I’m not trying to get pregnant), I’m 12% bf (DEXA). 

She appears to be around 25% body fat at that weight, which is impressive. Body fat percentage is a more significant predictor of fertility than weight alone. However, at her height, it suggests she has relatively low muscle mass to carry that level of body fat. Not as healthy as she thinks.