And you're still missing the point. There are more employees at Bioware beyond just game developers. And even among the game developers, they are not all writers. A 200+ employee company does not do a public hiring freeze unless things internally are completely fucked. Yes, they would not need to be hiring texture and mocap people for pre-production, but the entire rest of the company still needs to exist while you're focused entirely on the writing. Again, please refer to the over a dozen links(some of which lead to multiple studios/subsidiaries) and you'll notice how it isn't just purely game dev positions everywhere.
You do a complete hiring freeze when the finances are so fucked up, that a massive re-organization(this is the most likely scenario) is either about to occur or is already in progress, or the place is going to just get shut down. You're telling me I "don't work in gaming obviously" yet what you've posted indicates you've never worked at a level where any understanding of a corporate structure is actually needed. Bioware isn't 5 person game studio in the 80s working out of someone's basement or garage.