OP made it clear: marketers still have to turn to IT guys today to shape new funnel analytics. And it takes DAYS to see new funnels implemented, while it should be a matter of minutes - if only they had the right tools. Also, thanks for saying that growth hacking / coding geniuses are a myth. They don't usually have the skills, but moreover nobody would dare to grant them write access to the app repo...
I am still trying to figure out what marketing people do besides throwing spaghetti at walls.