Ignoring plot points in an MMO is normal in my mind because of how much of it has to be adjusted because it is an MMO. Doing every job, being able to change race and sex with a potion and no one mentions it, the mountains of dead animals we have created in the process of leveling. While some of this is mechanics, a lot of it had nods to it actually happening in what npcs say.
Like some mentioned earlier, the Primal fights are reacted to like we did solo, while talking to npcs in the are before the fight mention you grabbing some friends real quick.

MMOs are a buffet. You don't have to do all the side quests. You don't have to level every class. You pick and choose want you want to take part in. The lore is no different.