"I need to be clear: if you have any interest in learning marketing, I heartily encourage you to keep your equity and learn this stuff yourself. A developer who can market is an amazing combination."
"if you have any interest in learning marketing" change that to coding.
Simple statements != results. The comment of sales, sales sales is spot on that it is not easy, nor intuitive to "most."
Sales, sales, sales. Always be selling. Lots of people claim they can; few actually can.