It is about giving children the rights to full access to language which is every child's given rights. Would you think it is ok to limit access to language for hearing children? Since nobody knows how much each deaf child is gettting or how much they are understanding while they are young, giving them ASL is giving them the same rights that hearing children have to be able to develop language and concepts during their young age.
If someone locks up a hearing child in a house with no language exposure at all times, the person would be arrested...but it happens to so many deaf children despite not being locked up because spoken language is not fully accessible to them like ASL is.
As a teacher, I cant imagine taking those kinds of risks with deaf/hoh children's language development so I prefer to give them both languages.
AS for deaf ed...it is about teaching the cirruculm so that's a different story. We are talking about language arent we or are we talking about deaf education?