Yehong Zhu, the founder and CEO of Zette, shares her experience as a product manager at Twitter and Forbes, highlighting 9 ironies that she encountered in the role, including the harsh reality that product management is lonely, takes time to learn, and rarely has clear-cut outcomes. She also notes that true originality in product is rare, cutting corners is common, and PMs are often expected to be happy and cheerful despite facing challenging situations.