If you mean me
I have already pointed out that this is false. There is no rule for a character arc. There is no rule that ever forces you to change playbook. It simply gives you the opportunity to and a consequence heavy game, and the players all took this suggestion up with me only feeding it to one of them (the "bleed out into your mask" one). There was nothing saying that the creepy psychic being left for dead couldn't actually have stayed a creepy psychic although there would have been a permanent wound. And the only thing that made the cult leader stop being a cult leader was the roleplaying - and the mechanics being fluid enough to be able to allow him to stop being a cult leader in the mechanics as well.
For you to think that because players found character arcs compelling and to flow naturally out of both the system and the specific game they
must be forced is something I can understand. But it is not true and I have already said it is not true. Now please stop saying it is.