Why did it matter what Sylvanas said

[Lovelight-sargeras (Lovelight)]

@Fletheoff-malfurion

The Forsaken have always been using the horde for convenience, it even states it so in the vanilla/classic undead intro.

I like to think that this was true at that certain point in time. Over the years, especially after Arthas was killed, their relationship to the Horde would have evolved.