Essay author writes:
What is wisdom? I'd say it's knowing what to do in a lot of situations. I'm not trying to make a deep point here about the true nature of wisdom, just to figure out how we use the word.
I think this is the boundary determination of the problem being discussed, and that's "just to figure out how we use the word".
While the author's phrase, "A wise person is someone who usually knows the right thing to do", here he has touched upon a major problem in philosophy, which is about "the right thing". How to determine the right thing to then we can determine who is a wise person?
But I will ignore this issue, and just focus on "it's knowing what to do in a lot of situations."
So my opinion, if wisdom is understood like this then between smart and wise actually do not need to be concerned about the difference because in many situations it is two faces of the same coin.
The issue of the difference between smart and wise, can only be discussed just after you have mentioned the ability to act in unknown situations. This is just a matter of philosophy, seeking the right response for something that has not happened yet and is unknown. It is only here that intelligent and wise can be distinguished, the wise are the ones who know the unknown situations and have thought about what actions to take when that happens. Even when an intelligent person has acted appropriately in a situation, the wise man already knows, or at least predicted, the effect and end of the action. In other words, in my opinion, a wise person is who has views that can penetrate into various dimensions of various situations.
That is the special meaning of wisdom and the wise, whereas in public speaking, wisdom and intelligence can be expressed in the same meaning. And the last mentioned, that is about public speaking, I don't think it will be the subject of philosophy in particular, but in the science of public communication or sociology.