You are not the first to make the mistake of comparing I.P. with physical property.
They are not the same physically, in theory, in practice or in law.
Don't compare information with physical property :)
Since knowledge creation and nuclear weapons are both examples of things which the public pays for, I defend the comment as it stands. The distinction between IP and physical property does not enter into the claim.
Nuclear weapons are physical and as such can't be shared with the population but ultimately, assuming for a second that democracy works, american nuclear weapons belong to the american people, even though it is not under direct control of any singular citizen or at least it shouldn't be.
The distinction is fundamental. You can't copy at marginal cost nuclear weapons, but you can copy information indefinitely.