No users means no one left to object when the band is taken away and given to someone else.
I have zero interest in unencrypted over-the-air communications. The Internet can already trivially reach stations all the way out to the antipode of the planet, at any time of day or night, with my choice of public or private messaging. I can't wait until the spectrum-protectionist people die off and yield the bandwidth to the SDR robot builders that can use it for a digital transport layer.
Once the technical capabilities surpass the administrative permissions, the fun of hacking anything dies, for exactly the reason mentioned. Rather than the hardware saying "you can't do that", it's some old-guard buttinsky, and when the hacker says "wanna bet?", rather than slowly yielding to relentless experimentation, they make a call or two and then the hacker gets fined or their equipment is seized.
When every interesting application I can think of for ham radio has a regulation explicitly saying "no, that's not allowed", people just find another hobby to get into.