We've seen talks about this in the past. If the explanation for the reaction is "Magic caused it"... usually the players seemed okay with the result. Because it wasn't their own character's decision-making that forced them to run away, the magic is what compelled them to have to react in that way.I often wonder what those players do when they fail a save vs a fear spell
However, if we just went back and looked at all the threads made in the 4E era about the 'Come And Get It' power... the power that allowed a Fighter to pull a target adjacent to them using just "their words" (as per the fluff of the power)... there was a LOT of pushback (no pun intended) from players, saying that they did not like a non-magical ability to "tell them how to react". The power was replicating the action movie trope of the guy who got his enemy so wound up and angry via taunts and such that the enemy just couldn't help but charge the guy in a fury. But players felt that it was their decision as to whether or not to be taunted by insults and such, and having the game force them to move towards a Fighter in that way was a bad decision in the game's design.
This is what I was referring to above when I said it would be dependent on whether players were willing to "play along" with the story logic. If players are willing to go long with the narrative ideas of the trope and submit themselves to doing what these action movies portray in order to play out a similar story within their own game... then using powers like 'Come And Get It' were fine. But if players were not okay with it and demanded total character autonomy during any non-magical interaction... then the 4E game breaks down when powers such as these are on the table.
I myself don't have any real problem when a DM adds color to a scene by saying something like "The darkness of the cavern and the chill in the air cause a ball of fear to begin welling in the pit of your stomach..." in order to help get across the description and essence of what the narrative of the scene is meant to be. But other players do not agree with that take and do not like it at all when that kind of description gets used.