Matter of course use of future continuous

I am unable to fully grasp the matter of course use future continuous. The explanation says;

we use future continuous to talk about something which will happen, if everything happens as we expect

An example sentence is;

the government will be making an announcement later.

Can someone explain this?

I think the explanation you cite is a good one.

The government will make an announcement later. (There is no question of this. Short of an earthquake or other national disaster, they will make the announcement.)

The government will be making an announcement later. (This has a certain tentativeness about it. It says, "All being well, the government will make the announcement.")

The difference is very small in my opinion.