What was revolutionary about Courbet's subject matter?

Gustave Courbet's subject matter was revolutionary for depicting scenes of everyday life and ordinary people, challenging the traditional focus on historical or religious themes in art. He embraced realism by portraying the working class, rural landscapes, and mundane activities with honesty and detail, which was a departure from the idealized and romanticized imagery prevalent in art at the time. Courbet's bold choice to elevate the common man and everyday experiences as worthy subjects helped pave the way for modern art movements that prioritized authenticity and truth in representation.