Whatever the "it" is that constitutes a startup's purpose often can't be fully articulated in mission statements, OKRs, core values, etc. Either it's simply ineffable, or it's a metamorphosizing snapshot of the leading edge of a rapid process of discovery. Expecting such an already-abstruse concept to faithfully percolate down a rigid reporting chain is ridiculous, like sending old-English scrolls via carrier pigeon to narrate a live sporting event.

But communication of the "it" still has to happen, if imperfectly. So someone in founder mode would naturally focus on delivering the most faithful and timely version of "it" to the points in the organization where it'll have the most impact and be least susceptible to corruption in transit. Today that might be to a UX engineer. Tomorrow it might be to the board. It's a kind of plate-spinning that aims to reduce skew from the latest version.