In a functional organization, it's almost certainly going to be absurd to argue that you can't provide value to any of the meetings that you are invited to.
Can you help me find it?
As far as the GP, what I'm getting at is that they are tediously nitpicking my phrasing rather than addressing my point. If there are some meetings that make sense to spend your time on, (in the context of my comment) what the fuck does it matter if there are also some that it doesn't.
If they think they have never spent their time well on a meeting, an explication of that would be more interesting than saying that they can find better things to do than attend some meetings.