User blog comment:Hawki/Nova Covert Ops, part 3 - Reflections/@comment-4817-20161130120308/@comment-72.197.211.140-20161201034018

I understand your point, PsiSeveredHead. But when it comes to "well-defended," Tyrador IX certainly wasn't the case. Remember, the feral zerg already overran most of the planet by the time Nova and the Covert Ops crew arrived. There'd be no terran defenses at all, and since we're only dealing with FERAL zerg here, they wouldn't have been ready to defend against Protoss purification compared to zerg broods that are actually under real leadership. I guess I'm just not convinced why the Tal'darim aren't able to do it. A much better reason, IMO, if they can't, is if the Tal'darim Death Fleet is still weakened state from the events of LotV, not fully recovered after the war against Amon.