Are people upset because this is the first MMORPG to actually have a main storyline and they don't understand why they are suppose to follow along the story?

Every other MMORPG has never had an overarching story, this is the first one. Why don't people realise that this game is not WoW, WoW has never done anything like this "gating" but then WoW has never had a proper storyline. This is the first MMORPG I know that has story linking it with the expansion, the other story linking WoW with its' expansions was lore from previous games and novels.

EDIT: the reason I don't mention other MMOs is because I am not certain of them. I cannot speak of GW and I stopped playing SWTOR well before any expansion was released(there was no hint of a grand overarching storyline in that game though).