Да ну, почему по фильму? Элронд не хотел участи смертной для своей дочери, это вполне понятно. Вспомните хотя бы слова Гилраэнь: it is not fit that mortal should wed with the Elf-kin.<хрум>without the good will of Master Elrond the Heirs of Isildur will soon come to an end. But
I do not think that you will have the good will of Elrond in this matter.
И далее, сам Элронд: as for Arwen the Fair, Lady of Imladris and of Lórien, Evenstar of her people, she is of lineage greater than yours, and she has lived in the world already so long that to her you are but as a yearling shoot beside a young birch of many summers.
She is too far above you. And so, I think, it may well seem to her. But even if it were not so, and her heart turned towards you, I should still be grieved because of the doom that is laid on us.<хрум>That so long as I abide here, she shall live with the youth of the Eldar," answered Elrond, "and when I depart, she shall go with the, if she so chooses.<хрум>there will be no choice before Arwen, my beloved, unless you, Aragorn, Arathorn's son, come between us and bring one of us, you or me, to a bitter parting beyond the end of the world. Yon do not know yet what you desire of me
Так что Элронд был отнюдь не в востроге ,что его дочь будет жить с каким-то там низкорожденным смертным. Он, конечно, смирился с ее решением... а что еще было делать? Арвен уже не девочка и, наверное, сумела проявить настойчивость
