For security reasons it makes sense for them to be different devices. People and services may not want to allow insecure devices to communicate with them.
Why? It's not like the insecure device doesn't have my identity key on it. If I program it to spam people, I go to jail for spamming.
Why? It's not like the insecure device doesn't have my identity key on it. If I program it to spam people, I go to jail for spamming.