That's not how Nation State actors work. One of the things that makes Nation State actors dangerous is they have the patience and resources to attack a high value target at the most likely to succeed point. Backing that up, they generally have the intelligence to know when that best time is. And they for sure know that it's not at defcon when everyone is, as you say, paranoid and on the alert. They're going to get you at home, at happy hour with your non-security friends, in that bar with the great but insecure wifi and no 4g.
