When the information is already public, an institution can use this as a reason to not respond to an access request and just refer the requester to that information. More information that is published will definitely lead to fewer access requests or more specific access requests. People may see some information and may ask for specifics based on that.
Right now, we see that the information that's provided is not what Canadians are asking for. Unfortunately, they can't find the information that they want, so they have to go through the access request system.