On the positive side? That the power of imagination can lead us to truly deep, poignant experiences. That "a game" can be more than idle amusement, can enrich us, and give us practice for making morally upright choices in fictionally dire situations so that we can be better-prepared for making morally upright choices in physically dire situations.
On the negative side? That people can be incredibly tribalistic. That the idolization--indeed, fetishization--of the auteur designer(/DM) is a pernicious cancer on a lot of things. That the best results are, all too often, achieved not by speaking openly and honestly with others and letting them draw their own conclusions, but by using benevolent deceptions and concealing change beneath a just-thin-enough candy coating of fawning traditionalism.