I kinda see what you’re saying, but I think for the economics to work at scale (another person mentioned location) then the device should be small enough to fit in a food truck or a street vendor stand.

Once you have the size down to where you just need one person at a time operating it, I bet the big fast food companies will swarm all over the opportunity to create tens of thousands of micro-franchises.

Why drive for Uber when you could set up a mini McDonalds wherever the health department lets you get away with it?