The speaker ponders the difference between musicals like Hamilton and movies like Wizard of Oz, and wonders which they'd prefer to live in - a musical or a lifetime movie thriller. They ultimately choose the latter due to the potential monotony of living in a world that's always singing.
The speaker likes the idea of a world where everyone expresses their emotions through song and where there is foreshadowing in the music. This concept is inspired by the Lifetime movies where the plot is often about someone hiding a dark secret.