It means that through art, people can confront emotions, ideas, and experiences that might otherwise remain hidden or inexpressible. Art mirrors society’s fears, hopes, and contradictions, allowing reflection and growth.
Yes, they do – but art reaches emotional truths that logic cannot. Where science explains how things work, and philosophy asks why, art reveals what it feels like to be human.
Not necessarily an intentional message. But there is still a message, even if it is just a simple statement of existence or expression of a momentary emotion.
Depending on how big or frequent a lesson you count, I believe virtually everyone does. But if you mean intentional, considered learning, I'd guess 20% or less. Really though, I don't know. This seems like the sort of thing most people don't speak about commonly.
I'd say my belief that art is important to humanity in general supports the practice of publicly funded artists. Of course that funding still needs to be judiciously applied.