I'm arguing for simpler rules here overall.
Your point #1 misses the whole norm violation element. The reason it hurts if others are told about an affair is that others disapprove. That isn't why loud music hurts.
Imagine there's a law against tattoos, and I say "Yes some gang members wear them but so do many others. Maybe just outlaw gang tattoos?" You could then respond that I'm messing with edge cases, so we should just leave the rule alone.
You will allow harmful gossip, but not blackmail, because the first might be pursuing your "values", but the second is seeking to harm. Yet the second can have many motives, and is mostly commonly to get money. And you are focused too much on motives, rather than on outcomes.
The sensible approach is. to demand a stream of payments over time. If you reveal it to others who also demand streams, that will cut how much of a stream they are willing to pay you.
You are very much in the minority if you want to abolish norms in general.
NDAs are also legal in the case where info was known before the agreement. For example, Trump using NDAs to keep affairs secret.
"models are brittle" and "models are limited" ARE the generic complaints I pointed to.
We have lots of models that are useful even when the conclusions follow pretty directly. Such as supply and demand. The question is whether such models are useful, not if they are simple.