Except the ask CDev 2 answer did not include Tauren in the list of sentient races. For what you say to be true, then it again suggests the Old Gods controlled the taurens past the point of madness and so when the Titans arrived, they wouldn't be considered sentient, but then after the purge, they are?

What this really brings home to me is that the constructs may have been left behind to guard the Old Gods where they are not so easily succombed to the influence (by not being flesh) while leaving the rest of the planet in the hands of living beings (Aspects, Ancients, etc.) which may be why the Old Gods needed the "curse of flesh". Perhaps the curse is only that constructs become flesh and thus weak against the Old Gods, which they are designed to guard against, not that flesh is an unintended curse to begin with. As an allegory (if that's the right word): The curse of tongues in this world is the curse that separate languages occur which at times impede upon our ability to communicate, not that language itself is bad.