Bookkeepers do important work. But a bookkeeper is not the head of accounting.
Marketers are responsible for anything the organization does that touches the market. But many people with ‘marketer’ in their title simply go to meetings and do tasks after the real work of marketing is already done.
Some tech companies have hundreds of people in their marketing department. Most of them are simply playing catch up, because the engineers are making all the powerful and leveraged marketing decisions.
Who is making the difficult decisions on your team? That’s the person who’s actually in charge of marketing.