Nothing is gained by these interviews nowadays though, they’re just frustrating and weak because, as you say, the script never allows them to actually answer any questions.
Without them there is no direct questioning of the government at all, (whether those questions are answered or not is moot), unless they choose to have a press conference. They can just avoid all direct scrutiny.
Do you mean nothing to say as in they don't answer what they are asked or they don't have an announcement to make?
It just reduces scrutiny and accountability even more, it isn't many mornings when there aren't good questions for ministers to respond to