Because word of god is not debunked 'by what people say'. Nothing a fan says is ever going to be as good as what a developer says on the topic. That is elementary. Wishing the game was different is not equivalent to demonstrating it is different.
Your case has historically consisted of you inventing things, for example the idea that Alleria had the void elf transformation ability before she ate the heart of a dark naaru. Or the idea that blood elves can defect to the high elves to boost their numbers. Scenarios you have offered no evidence for and yet you treat as viable hypotheses.
What you want is for Blizzard to change their minds. That's fine. But what you cannot argue is that the game world right now reflects your ideal position. It categorically does not. If you want them to change their minds, at least acknowledge they'd have to change things and not that they would come to understand that the game as it is supports your position.