I just finished the reclamation of Gilneas? Why are Forsaken involved?

I quit during shitlands and came back during the current expansion and i decided to do the Reclamation of Gilneas, i have many problems with that narrative but many more people have called out its problems over the year that it has been released, my main question is.

WHY in the fuck are the Forsaken involved with the reclamation of GILNEAS! This is the faction that uses blight willy nilly and tried to exterminate Gilneas during MoP and then went full genocidal in BfA again. Why in the hell are they there to "help" retake Gilneas? Why are they even needed?

Narrativelly even if we are done with the faction war (Good) that does not mean that every faction now has to link hands and sing kumbaya. Gilneas has the entire alliance behind them, the Scarlets barely have any forces! Why are the Forsaken shoehorned into a WORGREN scenario!?

Who wrote this shit!?