She shouldn't feel bad, she didn't want them to get CI's, so the oral path wasn't appropriate, there is nothing wrong with that.
Oral schools have lots of kids with HA's but for kids with severe-profound losses, hearing aids will not provide enough access to speech for most kids to learn language through listening. THAT is why they would recommend a CI. They school would look at the child's loss, and their functioning, and the rate at which they are learning language and if it isn't appropriate, they would recommend a CI, or a change in schools.