Your link is talking about work Baran did before ARPANET was created. The timeline doesn't back your point. And when ARPANET was created after Baran's work with Rand:

>Wired: The myth of the Arpanet – which still persists – is that it was developed to withstand nuclear strikes. That's wrong, isn't it?

>Paul Baran: Yes. Bob Taylor1 had a couple of computer terminals speaking to different machines, and his idea was to have some way of having a terminal speak to any of them and have a network. That's really the origin of the Arpanet. The method used to connect things together was an open issue for a time.

"A preferred alternative would be to have the ability to withstand a first strike and the capability of returning the damage in kind. This reduces the overwhelming advantage by a first strike, and allows much tighter control over nuclear weapons. This is sometimes called Second Strike Capability."