This is true but I think that its not really a binary classification and there is a spectrum from useless and trivial obscurity (base64 encoding some "secret")

This is true but I think that its not really a binary classification and there is a spectrum from useless and trivial obscurity (base64 encoding some "secret") to actually useful obscurity. After all, you can call password authentication "security through obscurity" since you only need to know the correct sequence of characters and your security relies on that sequence remaining obscure.