The same Russian ice dance coach that taught me to bend my ankle sideways to get deeper edges. He had been an Olympic skater. Maybe his emphasis was more on competitive performance than health and safety.
I took group lessons from another Russian coach who did some things most American coaches would consider dangerous. E.g., he had a group of us adults running up and down bleachers for off-ice warmup. The kids he had running up and down a steep flight of stairs. He had young skaters put their weight on young other skaters while they stretched, to make them stretch more. And he had roughly 9 or 10 year old boys lift similar age girls, one after another. I've wondered whether Russian coaches tend to be less concerned with long term health and safety than Americans, because American law makes it easier to sue people. But I don't really have a big enough sample to be sure of that, and I'm sure it varies with the individual.
Skating is a form of performance dance. I'm sure you know that in all performance dance forms, people don't always seek to move in the healthiest possible ways.
I took a class on injury prevention for dancers with a bunch of ballerinas, based in part on
Daniel D. Arnheim's Dance Injuries and
Blandine Calais-Germain's, Anatomy of Movement. Both emphasized that hip turnout was safer than twisting through the leg and ankle (I forget the main issue - might have been knee injuries, such as ligament sprains and cartilage wear??). But they also talked about over-stretching hip turnout as a common dance injury problem. Of course, ballerinas often push stretching to extremes, sometimes deliberately dislocating joints, including hips, according to the teacher of that class. (It doesn't help any that entry into professional dance companies is extremely competitive.) But some figure skaters are just as competitive about flexibility.
I knew one gorgeous adult figure skater who loved to do moves with about 190 degree or maybe more hip turnout. She said it hurt her back a lot. But it got her a lot of attention, and she loved to do it anyway. I suspected the back pain meant it wasn't healthy for her. A lot of skaters tried to copy her moves - but needless to say, without that degree of hypermobility, they mostly couldn't.
For a while I started to develop knee pains when jumping. My coach at the time (a different coach) told me it was because my of that bent ankle, and the leg alignment it produced. She told me to fix my leg alignment. I eventually got rid of the pain, so maybe it worked.