The security of nakamoto consensus (Bitcoin and co) relies on a level of broadcast which is pretty incompatible with a world where the network is hostile and looking to disrupt your traffic.
It would be prohibitively expensive and difficult to disrupt point-to-point radio (e.g. ham) and satellite communications enough to cripple Bitcoin.
I'm not incredibly familiar with ham, but if you ever broadcast then you're inviting the authorities to find you, and shut you down. If you strictly communicate point-to-point it doesn't seem likely that you'd be able to tell the entire world about new blocks within a reasonable about of time. If you keep the 10 minute block interval then delays longer than, say, 1 minute, would be extremely problematic. I'm not sure how a Ham radio network could reliably tell the world about new blocks within 60 seconds without alerting the authorities.
Oh and FYI the idiom is "worse comes to worst" (analogous to "push comes to shove" -- an intensification past an activation threshold or tipping-point)
Of course that's not to say the problem is ignored by other communities. Many people are well aware of the full set of dependencies of these crypto projects and the ways that external forces might be disruptive. And many people are working on increasingly sophisticated ways to eliminate these dependencies or ensure viable alternatives if worst comes to worst.
[1]: https://github.com/bitcoin/bitcoin/issues/16599
[2]: https://blockstream.com/satellite/#satellite_network-coverag...
[3]: https://www.wired.com/story/cypherpunks-bitcoin-ham-radio/