The speaker gives in right away. "Okay Okay" sounds like someone ending an argument they're tired of having, and "I guess you're right Cowboy" is said with a shrug. The bleak claim that "no one attains anything" is accepted without a fight. Calling the other person "Cowboy" adds a teasing, half-affectionate tone, as if this is a friend who talks tough and has just won the point.
Then the poem swerves. "Never mind," the speaker says, and the mood lightens into something odd and playful. A "typewriter demon" is coming home, which suggests the urge to write, and it arrives "howling butterflies." The image mixes something wild and noisy with something delicate and pretty. Judging by the imagery, the speaker admits that nothing may be achieved, yet the pull to make something, to write, goes on anyway and even brings a kind of joy. The mood is wry, loose, and quietly hopeful.