Equestria Girls is part of FIM's show lore. It is however kept seperate from the show's events as one thing the show, eqg, and comics are in their self contained part of FIM where it is all canon but neither of them have to make a direct reference to each other. This is done to ensure that anyone who disagrees with a comics or eqg story won't have to be concerned about it being referenced or shown in the show. The only rule they share is that the show's canon holds priority over all contradictions.
Read the part where he says 'according to Hasbro'. This isn't some vague guess, ambigious answer, or an attempt to misdirect the viewer on what major event is going to happen on the show, this was something a major comic book artist was told by DHX's very bosses for the show's production and other assets. Thus it can be attributed to that DHX also recognizes the comics as canon but is under no obligation to pay heed of their stories on their show.
I don't mind you saying that Lauren is no longer working on FIM. However, it's point was for me to show that the creator herself envisioned Nightmare Moon as a seperate entity from Luna. Because the show had made no attempts to discredit and the comics had in fact been granted to explain Nightmare Moon and remove the mystery of it in the Nightmare Rarity arc, her word is still a valid claim to use.
Again, you're missing the explanation that the show and comics along with other media sources officially licensed by Hasbro operate in their own self contained parts to the same verse in FIM with the only rule being that any contradictions made against the show's lore will have the tv program's own take override it.
As I've stated, I've spoken with my evidences for my case that clearly support my belief that the comics are canon and are a seperate part of FIM's lore that the show is spearheading the narration of the series.