Because with „Xbox Servers“ usually all MS game related servers are meant. This is due to „Xbox“ is the game brand of MS and not only the Xbox game console.
So if the Game Servers - aka Xbox Servers - are down, also we PC folks are impacted 
Because with „Xbox Servers“ usually all MS game related servers are meant. This is due to „Xbox“ is the game brand of MS and not only the Xbox game console.
So if the Game Servers - aka Xbox Servers - are down, also we PC folks are impacted