This has nothing to do with national security
It's the argument that is being pursued here, but the underlying driver has nothing to do with it. The traffic they're talking about is associated with a controversial HF email system called Winlink.
The reason Winlink is controversial is because it's popular with the sailing crowd as a cheap alternative to commercial email services, both over satellite phones and HF radio. Because of its popularity, it occupies a huge amount of HF spectrum.
The "too cheap to pay for a commercial service" use case is seen as antithetical to the purpose of amateur radio, which is primarily about that of experimentation and self-training.
Biting the hand that feeds IT
