The usual types seem to piling on over this Shcherbakova interview where she says she weighed 42kg and ate little for the Olympics. Yes, she went to extremes, but she is Olympic champion for life. It was worth the price. I think Shcherbakova will agree. No-one pushed her. Not Eteri, not her parents, she chose. The usual conspiracy is that Eteri wanted Kamila double gold medallist and was her favourite, so why would she push Shcherbakova to have an extreme diet. Shcherbakova probably could have fallen on both quads and won a medal.
It's not just a Russian skating thing, jockeys resort to extreme weight loss, in combat sport fighters go to extraordinary lengths to cut weight. The yoyo effect would be far more dangerous than anything Shcherbakova experienced.
Then you have contact sports where CTE is rife. American football has not been outlawed for children despite everyone being well aware of the damage being sustained to their brains.
Lastly, skaters trying to weigh as little as possible without affecting performance did not begin with Eteri, this has existed throughout the entirity of the sport and in every country.