There are a lot of countries with navies that could just happen to decide to conduct a live fire training exercise in the general area as your ocean facility and just happen to have an accident that takes you out, with enough plausible deniability that they probably would not get in any serious trouble over it.
There are a much fewer number of countries that could take out a lunar facility and I don't think any could do it in a way that has any plausible deniability.
Sure, but if the goal is to get around copyright law, i think the usa would be very happy to do it. No plausable deniability needed.
Why would countries not already do the same thing to commit high seas piracy today?