In his memoir, Eat a Peach, David Chang talks about all the other stuff that you have to do in order to successfully run a business. Things like getting good at real estate, basic contract law, navigating bureaucracies for regulations, and so forth. He calls this the Compound Art - doing what you showed up for (in David's case, making awesome food), and also doing all the other ancillary things.
Bill Burr calls this "Being good at the business". In his podcast, he's lamented the tragedy of good friends and fellow comedians that are, in his words, better comedians than he is - but they can't properly launch a road show; or they can't get the word out about their latest special; or they can't choose the right business partners. They're bad at the business. So you don't hear about them.
As a practitioner, you have to be "Good at the business". You have to master the Compound Art. Not only do you have to be great at what you do, but you have to defend that with skills to defend, protect, and promote what you do. Why do comedians go on late night show interviews? Why do book authors go on signing tours? Why do doctors, programmers, scientists give talks at conferences, publish research papers, and run blogs? Those aren't in the job description.
And yet, the ones you hear about - they do the things that aren't in the job description.