That’s not really true, is it? Because starting King is really one of three classes: Good King, Evil King, or Neutral King. King’s ROLE is confirmed, but not their faction (w/King’s faction being impossible to 100% determine until death due to being immune to investigative classes). That make the King just as much a question mark as anyone else. Because of that, King’s info is just as likely to be fake as someone claiming to be Sheriff. If someone claims to be Sheriff and have found Unseen, you have no idea if they’re telling the truth. Similarly, if King claims to have found Unseen, you have no idea if they’re telling the truth or if they’re trying to get BD killed until it’s over.
In all those cases, it involves the players using their own best judgment on whether or not to trust the info. If people just blindly trust it, that’s on them, not an inherent problem with Allies itself. In the same way it’s on BD if they just blindly trust a Sheriff or Observer claim and vote someone up based on just that and nothing else. The problem isn’t with the abilities, but how people use them.