And you're both ignoring how I said that it isn't just that Mythal prefers a human host and human daughters or just that the protagonists are consistently written to be human in mind:
BioWare based Andrastian humans of European Christians (and the Rivaini on Moorish Spaniards), and elves based on real-world minority people; Jews, Gypsies, Afro-Native Americans, etc. Rather than treating this distinction with sensitivity, they feel no qualms about applying real-world problematic tropes with real-world problematic connotations by having white European Christians human characters consistently upstage indigenous folks elves with their own lore/culture/technology.
Human characters in the Dragon Age universe are consistently shown to understand and utilize elven lore, magic, knowledge, and technology better than the elven characters can.
Finn from Witch Hunt figures out that Eluvian is an ancient elvish word that means "mirror" while the Dalish Ariane had no clue, and he figures out how to use ancient elven magic rituals to track the eluvian to find Morrigan while Ariane just follows along and gives her blood to fuel the ritual at the end.
Morrigan, a human, researches eluvians and manages to reconstruct one from scratch and is treated as though she knows exactly what she's doing. However, when Merrill, an elf, tries to reconstruct an eluvian from scratch, the narrative treats her as messing with powers beyond her control and technology too great for her to understand. (Even though she explains several times that the only reason the mirror hurt Tamlen and Mahariel was because of the darkspawn taint, so once she used magic to purge the shard of the taint, it was no longer any more dangerous than an actual piece of glass. Yet every character in the game and even the devs treat it like Merrill trying to fix the eluvian itself as the problem, and she just doesn't know what she's doing, and that the only way for her to "get better" is if she completely destroys/gives up on the mirror like a good elf. And it takes Mighty Whitey Human Hawke to show her the light.)
The Elven mother-goddess? She's human. The elven mother-goddess's daughter? She's human. The character to tell the Inquisitor all about the Eluvian, the Cross Roads, the Arbor Wilds, the Temple of Mythal, ancient elven lore, Well of Sorrows, etc? She's human. The character to drink from the Well--the last scrap of ancient elven knowledge? Most likely human, since the devs have arranged it so that only either Morrigan or the human-intended protagonist drinks it.
Elves may be turning out to be an important race in the lore, but so far they certainly aren't shown to be active players in their own history, lore, culture, magic, technology, fate or future. It's human characters (Flemeth, Morrigan, human intended protagonist, etc) who are consistently shown to understand and utilize it better than they can; somehow showing that human characters master not only their own culture, knowledge, and technology, but the elves' knowledge and technology better than the elves can.
And that's what I have a problem with.