She doesn’t need to have any obligation or accountability. She didn’t raise them, she trained them as students only. She isn’t their mother. The students have an unhealthy obsession that doesn’t care for anyone they hurt. She isn’t responsible for them choosing to act crazy.
You can tell she didn’t raise them since she only ever said she trained them, and there was no scene of her raising kids. They also have no clue what she looks like or even her name. It makes no sense to think she is like their mom. It’s like you deciding to stalk your own school teacher just cause they taught you well and you like them.
no accountability towards her students at all :/