You don't think that's a little bit nitpicky?Well, they actually already have gone against lore with the inclusion of the Catapult-K2, which is explicitly noted as extinct during the time the game takes place.
One could say there were extenuating circumstances behind its inclusion, but one could also say it sets a precedent, so I understand the concern, and the time to voice this kind of thing is before the expansion is finalized, because they certainly won't be removing content once it ships.
Its not cleanly analogous to the current issue. But also, it's in this game as a Marauder/Warhammer substitute since it also has 2 ppc's. It wouldn't have been in at all if Sauron hadn't arisen.