Yeah no. Dana is the CEO, he's the top guy in the UFC. Ari is the CEO of Endeavor their parent company so he's both of their bosses.
You guys seem to be under the impression that talking to the media is Dana's main job. It's not. He runs the company, he gets the deals made. Hunter has been groomed to do the same, and if the day comes Dana retires he's the only one who can replace him. As I pointed out in the post you replied to, the "loudmouth who talks to the media and announces fights" is probably gone after Dana retires. It's a role unique to the UFC that Dana chose to do but it's not his main job.