This has been years in the making. We're going to see a shitload more reports (and books) of how incredibly fucked the entire campaigns and administration was under that orange fuckwit.
NDAs are the biggest crock of shit ever and should be made universally null and void, yes, even in cases where they're valid. What the fuck is the point of having freedom of speech if someone can just coerce/threaten/force you to into signing it away?
I think there is an argument to keep them for things like products in development phases to stop people from blabbing to possible competitors, but this particular situation is bullshit.
Technically a Page 13 in a government/military setting is an NDA. Now in your ideal world, sure, you'd never need to keep secrets, but in the real world, you probably don't want a potential invader to know your exact defense systems, capabilities, guard locations and the best and least guarded places to come in and out.
Even assuming a completely peaceful world, you probably don't want to be sharing the passwords to critical infrastructure or the private medical information of people on a hospital database.