So, I guess @Rugby and I just made this up. Maybe I was dreaming for the 3 weeks I ran my Mac Mini as a Roon client without an installed Roon core. In all seriousness, I can’t explain why someone can’t get it to work, nor do I need to.
https://community.roonlabs.com/t/restart-roon-rock-remotely/233079/51?u=jim_f