Don't overestimate the general audience. You can scan QR codes with every modern camera app, but if you don't know you can, you'll have to wait for someone to tell you. It's been months since I last saw a QR code and that was just because of a TOTP setup, I doubt most people use them in their daily lives. Many apps using them like to pretend you need to download their app to scan them as well.

My biggest issue, outside of the usual terrible websites these codes link to, is that I often find myself with a phone already on battery saving mode when I go into a restaurant at the end of the day. Having to do conscious battery management in case I want to order desert is just an unnecessary pain.