Claim? It's a matter of history. Her name is Valentina Tereshkova, and she's still alive. [0]

[0]: https://en.wikipedia.org/wiki/Valentina_Tereshkova

Moral bankruptcy is probably a bridge too far here: in weapons, especially with weapons of such power, espionage should be expected. Besides, upon first use you advertise the possibility and that alone will be an enabler, an existential proof that something is possible but you don't know how is a completely different story than groping in the dark while wondering if a thing is possible or not. Any kind of lead will surely be sooner or later be squashed. Note that nobody thought that using the patent system to get IP protection on the Atomic Bomb was a good idea: our friendly ways to establish who gets to make bank on an invention like that would simply fail and would actually pass valuable information to the perceived opponents.

When applied to medicine that same attitude becomes parasitic: you may be able to make much more money by restricting the distribution of the knowledge that could save people or prevent their suffering. This is where Martin Shkreli and other such characters come in to play.