It’s overkill for personal networks, but as others mentioned if you manage a fleet of devices of various types (mobile vs desktop vs laptop). Then managing connections via profiles is the way to go.

Push updated profile via MDM. End user should transparently receive the updated profile before logging into corp network.

No reconfiguration required on the user end. Reduced or no calls to internal tech support.

Personally, I just use the method you describe. Post a QR code for my guest network and be done with it.

I was also wondering that. Some iOS configuration options are only available via profiles (and not the GUI), but I don’t see any of these on the site.

They're for automated deployment to many devices. In general, for personal use, QR codes for WiFi are more portable as they work on iOS, Android, etc. without any special magic or setup.

If you have MDM, then great, use these. Otherwise, I have a QR code and plaintext on the back of many pantry door with WiFi deets.

For personal networks this doesn’t make sense but does seem like a fun project to build. The profiles are really most powerful for enterprise networks.