"There is also scant evidence their machines, or ozone in general, can safely eliminate SARS-CoV-2..."
That's the critical word. It's not that tough to kill (deactivate, neutralize, whatever) coronavirus. Ozone will definitely kill bacteria, and likely "inactivate" most viruses, but so does a lot shit. You could, as Trump suggest, inject bleach. You could, as my idiot brother-in-law did, claim that his gym was safe to reopen because he used a machine that vaporized hydrogen peroxide. The trick is not killing a whole lot of human cells with it. So I could see this as a reasonable approach to sanitizing equipment (masks, equipment), but terrible for sanitizing spaces.
One of the techs that HVAC vendors are pushing is "needle point ionization": basically jolting the air with electricity to split molecules and give them a charge. It does a couple of things: 1) makes contaminants clump together, so they can be filtered out more easily, 2) damage the molecules in viruses. But, when you split O2 molecules, they recombines as O3 (ozone). They have to monitor to the ozone production, to avoid degrading the interior air quality. What responsible engineers view as a dangerous byproduct, Kobach is pursuing as a goal. (Assuming he was pushing space sterilization, not equipment sterilization.)