I agree that the PDFs & scans are not the best option. Thats why we created a dynamic menu, more like a Shopify store. Restaurant owners can update their menu at any time and even accept orders direct from the table (paid online if preferred).
To be clear, I think your website is a good idea and a good movement forward. I'm just a curmudgeonly old guy.
Maybe I would be happier if you did what I sometimes see others do: abuse the error correction in qr codes to make the one you produce more interesting or unique. So instead of an anonymous url injector, it looks like a menu and has your logo or brand somewhere clear.
Probably most more simple systems use url shorteners so they can update the URl it's revering to, since you sometimes need to update the menu. With Menu.Cards you can just update you menu dynamically whenever.
Btw if you want to see a demo of what a menu could look like: menu.cards/s/demo