[Morwen]

Was Arwen one the elves living a "life of stagnation" though? She may not have travelled as extensively as Aragorn but during her stay (or stays) in Lorien it is possible that she may have spent a good deal of her time learning what Galadriel had to teach, as Galadriel herself would have spent time learning from Melian. If these teaching sessions involved the use of sanwe, then Arwen, though not having perhaps a lot of rich personal experiences, can tap those of her grandmother is willing to share. This could also have been done with her father and grandfather. Given her lineage she probably had as thorough an education as an elf could have in the Third Age. I guess what I'm saying is that elves may not have a need for direct experience in the way that humans do.