Even with deaf parents and a native command of ASL the hearing person will have missed the experience of growing up deaf, including residential school. For many members of the deaf community, speech and thinking like a hearing person are negatively valued in Deaf Culture. There is a fierce group loyalty, and this may extend to protectively withholding information about the community's language and Culture. Going back to residential schools, these schools provide a vital link in the transmission of Deaf Culture and Language.
Children here are able to communicate in a language readily understood by each other.
Deaf children are able to partake in social clubs, sports and importantly enough, to be around deaf role models. This is not to say that mainstream education is iniquitous for deaf children, but we must keep in mind that socialization is essential to a child's growth and without a common language socialization is limited.