There are various reasons why information should be kept secret. Certainly, there are good reasons related to national security, but there are also times when the content of certain meetings in which people in government have decisions to make are kept secret because that lets them speak freely, without feeling they need to pay attention to what they are saying. However, as you said earlier, it should be limited to very sensitive documents or subjects.
On May 16th, 2022. See this statement in context.