That's funny, my reasoning comes from the opposite end of the ego spectrum - creating a blog or any other kind of social media presence means putting myself out there and inviting attacks on my ego. So I avoid doing so to protect my ego. Anytime I think of doing a writeup of something and sharing online, my subconscious starts thinking about how people will perceive and judge my work and I scram back into my ego shelter. I won't have to face feedback and criticism if no one hears about me or my work :D