Bias is subjective. I can quote multiple developer and creative sources affirming that Blood Elves are High Elves and therefore a Horde race.
And yes, Gnomes are far more important to the Alliance than the High Elf remnant. Gnomes are present in multiple Alliance settlements. Gnomes provide a valuable service to the Alliance in providing their advanced technology. Gnomes are also a playable Alliance race, that alone makes them far more important the High Elf remnant in the Alliance.
True bias is insisting that non playable Alliance High Elves are more important to the Alliance than the Gnomes, especially considering lorewise what the Gnomes sacrificed for the Alliance.