The US bullied the rest of the world into passing these anti-circumvention laws that make it illegal to modify the appliances you buy. Stick it to them and let us run our own firmware free of US cloud services.
As someone who knows nothing about entomology, it reminded me of this one beetle with a comically large pointy bit. I think it's called a hercules beetle.
Your proposal is just an idealistic version of early US. You claim that corruption is fundamentally impossible, but assume that magically "the monarchs aren't allowed to own property" without regard to enforcement. You claim to have an alternative to democracy but still propose majority voting on replacing rulers and constitutions. You simply assume that monarchs will keep each other in check and not devolve into the conspiring, warmongering tyrants that history is full of.
Power can always be abused to get more power and go against all your original ideals. The only way to definitely prevent corruption is to ensure power is never concentrated in the hands of few.
How does that increase the risk compared to something like JBOD or overlayfs? In both cases you will lose data if a drive fails. Keep in mind that this is btrfs raid0, not regular raid. If anything that decreases the chance of corruption because the metadata is redundantly stored on both drives.
So what is the reason for doing it that way?