While I tend to agree more with your answers than edrxty baseless claims about spread spectrum and unrealistic bandwidth negotiation (doesn't work with hidden nodes), it's important to note that there are alternative models to the ham spectrum management model. Namely:
ISM short range device (SRD) - the rules are very simple: transmit anything you want, no more than xxx watts, tx duty cycle no more than 1%. IMHO, this can be scaled to ham frequencies (ex: 0.01% duty cycle).
ISM 2.4 GHz - the rules are (basically) transmit only if no other signal is detected above threshold (-75dBm). Exponential back off otherwise. This is also called the Aloha model. This model also works most of the time, although its applicability to HF propagation is unclear.
The history of HF packet radio going back almost 40 years now, shows it stomps things pretty bad. RTTY and PSK31 ops simply cannot operate nearby HF packet channels.
Aloha DOES work really well for decades on "toll quality VHF FM" strong high SNR local packet radio LANs.
Everyone's gotta be able to hear everyone or else channel thruput drops to about zero. Easy on a city wide VHF FM packet lan, impossible on HF.
Reminds me of thin net ethernet in the 80s (thicknet also, LOL). One babbling transmitter and the whole LAN is down for everyone.
ISM short range device (SRD) - the rules are very simple: transmit anything you want, no more than xxx watts, tx duty cycle no more than 1%. IMHO, this can be scaled to ham frequencies (ex: 0.01% duty cycle).
ISM 2.4 GHz - the rules are (basically) transmit only if no other signal is detected above threshold (-75dBm). Exponential back off otherwise. This is also called the Aloha model. This model also works most of the time, although its applicability to HF propagation is unclear.