I agree that not everything needs to be encrypted, but unfortunately a lot of people who browse the web are concerned when the browser complains that something is not secure.

From the browser maker's side, how does a browser know whether something should or should not be secured? They have clearly taken a more aggressive approach to inform users what is going on within the underlying protocol. While I do agree that not everything needs to be encrypted, I also agree that the user should know what is or is not happening under the hood.