Not necessarily. You want to disclose to your friends and followers, but you may not want to disclose your identity with the whole world. We are just too used to surveillance to even realize that it's not needed.
Discussion
well the beauty of what you are describing is the ability to use anon accounts but be able to prove to others that "you" identity of another account controls this other anon account where random strangers may not know this.
you could do this by generating a new nostr priv key and then messaging to followers you want to know proof that you control this other account.