.I do find it a bit funny that in Hollywood thetrack to be a showrunner seems to always start with being a successful writer. I mean, if you're a good writer I can see leading the writer's room eventually, but there are so many other parts of successful shows, such as direction, budgeting, visual design, etc. Why would anyone presume a great writer would have the skills to produce?
I remember a few years back a Canadian writer/EP was talking about the differences prpducipp a show in Canada vs the US and the biggest one in the organizational structure was that Canadian TV doesn't have showrunners - they have Head Writers, who are the ones in charge of story, and another EP who is in charge of finances for exactly that reason - being good at writing doesn't mean being good at budgeting, and vice versa. I may be wrong but I think in a lot of English TV it's the same.