I once worked with someone well renowned in my circles who gave talks, ran a blog, was cited/edited other peoples books.

His code did not match the hype, to say the least. His SDLC even less so.

There is probably an ego associated with being renowned that doesn't align with team-based work. He likened basic things like code reviews or PRs to being brought before The Hague and that the rest of the team was a bunch of bureaucrats.