Without a specific context or reference to a particular work or quote from Kurt Vonnegut, it's challenging to provide a precise interpretation. However, in general, when an author expresses being a "real person," it might suggest a desire for authenticity, genuine connection, or a rejection of pretense and artificiality.
Authors often strive to convey a sense of authenticity to connect with readers on a personal level, making their narratives more relatable and resonant. Vonnegut might emphasize his realness to break down barriers between himself and the audience, fostering a more intimate and sincere engagement with his work.