You can try to spin it whatever way you want, all of this started in a Guild Wars 1 expansion and Guild Wars 2 is a continuation on that story. That is a fact. The rest is just you arguing semantics, and poorly at that. Whether you don't feel like Eotn was part of what you would personally define as "gw1 lore" is pretty irrelevant. Technically it is as it was released within the franchise of Guild Wars 1 and has as much right to call itself GW1 lore as any other added content to the game.
And I wouldn't call accepting all parts of the Guild Wars 1 story equally being willfully ignorant. Sure there is a split in the narrative, there is no argument about that. That doesn't mean one part of the story is less part of the history of Guild Wars 1 then the other.
Selectively choosing what you think is "Guild Wars 1 proper" and what isn't just because one part of the lore is connected to GW2 and another isn't is a bit of a self serving mind set to have. Seems like you're just choosing what fits your personal opinion. You are not the director of this game after all, EoTN was introduced as cannon and treating it as if it's not part of the overall Guild Wars 1 lore would just be arrogant on our parts. Who are you to tell people what parts of the Guild Wars 1 franchise is "proper" story and what isn't?