I have always thought that if someone understands his ideas well, he can express himself in a brief way without losing the essence and meaning of what he says.
This does not mean that the ideas are not complex, but that it is possible to summarize it sufficiently so that everyone can understand it in a simple way.
Definitely, I don't see the point of being verbose really. I think the difficult part and probably takes time to develop is trying to be brief and to the point without being overly terse.