And I'm asking you to rid yourself of the assumption that the Asur and Eonir are homegenous in thought processes and trust Boney's ability in, for lack of a better word, "humanising" Elves. There were all sorts of assumptions about Dwarf thought processes before we really got to know them in Boney's world, and Boney's construction of the Dwarfs was in fact much more lenient than the general process GW would lead you to believe. For example, Dwarf obsessiveness with Grudging people has been toned down considerably, and Boney presented an absurdly wide specturm of Dwarf perspective that one would never expect if they just consumed canon Dwarf material.
Asarnil is perhaps the only Elf we really got to know, so our perspective is skewed because that's like only getting Kragg the Grim as your Dwarf contact. Asarnil was always going to be like that, but the assumption that no matter what Elves are always going to treat humans as a whole as children is a bit like generalising that all Dwarves think that resolving grudges is the most important thing ever. The Asur would never "lower themselves" to asking humans for help, but these Eonir approached us for support, something the proud Asur would never have done. I don't assume they will be like the proud assholes over the seas, because their history is fundamentally different.