I love the criticism. It means we are in the "then they fight you" phase of the "first they ignore you, then they laugh at you, then they fight you, then you win" pattern.
Do not challenge their criticisms because that never works, but instead try to get them to identify what could happen that could convince them to reconsider that their criticism may be incorrect. If they'll do that then you know you have someone you can have a conversation with, few will do this.
When people reach out I hope I am kind. Bitcoin is for everyone.