IMO credentials only really exist for the benefit of people in the business of selling credentials. No industry has credentials when it first comes into existence. Over time, optional credentials become mandatory because laws are passed, and most likely these laws are drafted by lobbyists or "industry leaders" working for the credentialing entities. In other words, they exist because of corruption, not because of any real market need. I doubt these entrenched organizations are going to let AI interview software cut into their bottom line...