Secrecy is good
Privacy is good
Crime is not necessarily bad
You don't have to even go Anne Frank to make the argument.
Secrecy is not necessarily good.
For private individuals I think it probably is, not for public companies or especially governments though as they're supposed to accountable to other people.
Tell me your personal data, passwords, where you keep your money, and that thing you will take to your grave.
Privacy and secrecy are related concepts but they are not the same thing.
Did you not read the word "necessarily"?