We come back to an earlier point. Game mechanics regularly intrude on what players can decide their characters do. There have been arguments in this thread seeking to show that RAW doesn't allow that.
Yes, game mechanics regularly intrude. I didn’t ask if they ever do, I asked if they must in this case.
And this gets back to a question I asked earlier: how do we distinguish between things the player decides, and things the referee decides? My answer, partly because I like clear definitions and partly because I just believe in it as a game design principle, is that players control their action declarations (and therefore, by implication, their character’s thoughts/feelings/emotions), unless a specific game mechanic clearly states otherwise.
Some posters seem to prefer that this a privilege granted by the DM, who can revoke it when they see fit.
Set that aside for a moment and ask instead: what is the moral difference between say Deception skill deciding what a player can decide their character does, and any other game mechanic? Regardless of whether we think the RAW allows it or not, why is it more worrying to say that a dragon could roll their intimidate and make a character unable to approach, than that they should use their frightening presence?
Because if that action declaration can be used by the Dragon to override the player’s right of autonomy, then any NPC can do the same, which leaves us with the possibility of a goblin intimidating a Tier 4 barbarian with a lucky roll, if the DM thinks that’s what that PC “would do.”
And, again, if such a disconnect actually occurred, the real answer is that those two people probably shouldn’t play together. But it’s the underlying principal that the DM arbitrarily decides how a PC reacts that I don’t want to validate.
Also, if the Dragon could do that then it wouldn’t actually need an ability that accomplishes the same thing. Just sayin’