I think the point of simplicity here is that you apt/yum/yay/whatever install qrencode and then go to town.
You're on your own machine, you know the exact spec used to generate the QR, and while you're at it, you can use the same tool to generate TOTP QR codes and WireGuard configurations and a bunch of other things like links to websites or automations for Tasker (et al).
The world is your oyster when you know what and how the "magic" works, and while you're at it, you aren't risking pasting your WiFi passwords into some random website.