You talk recklessly, but I get it. It's the internet so you have an artificial spine. But little man I guarantee you wouldn't last long if you and I stood on even ground face to face.
I used to powerlift and I still lift with powerlifters. This culture is not unfamiliar to me.
I have also taken courses on nutrition and disease.
Her weight is still unhealthy dispite her being a powerlifter. Many powerlifters have short life spans because of the effect on their heart and other organs. That weight is not sustainable and will eventually kill her if she doesn't lose some.