I tell guests its a long, complex password (it is, and it is on a separate VLAN where all my IoT resides, too). I then ask them to hand over their device so I can enter the password. There's a trust thing going on there, but this is deliberate as the trust goes both ways (my internet connection). If they don't trust me to fill in my password on their device (they may of course watch me do it), I wouldn't want them on my network. That never happened but I don't run a bnb.
What is the purpose of typing in the password for them? It's not keeping it a secret. Usually the OS lets you see it. For example on macOS they can just search for it Keychain Access, and even though they may not be able to get to it on iOS, the built-in WiFi sharing will bring that password to their Mac for viewing there.
IMO it is just easier to display it on a computer screen in a large-sized text and let them type it in themselves, e.g., the 1Password large type show option.
Seeing separate VLAN being mentioned makes me think you are also have the ability to run a temporary additional WiFi network when guests are over as well. That could just use a rotating password with a memorable word scheme to make it easier to type.
Yes I am aware of that they can read the password (if not in memory).
These friends are not very technical, and the purpose is that I use their device to fill in the complex password. It would take much longer if I were to spell it out, and its likely they would make typos. By handing me their device, its a sense of trust doing so. In return, I give internet access.
Using WiFi hotspots is very much history in Finland. Nearly everyone has unlimited 4G at least and most populated places have coverage.
Using a laptop in a café might still be a use case if you don't want to run your phone hot and drain the battery.
We enjoy the cheapest data rates in Europe and certainly cheaper than in the US. Which is kind of weird because in general price level is everything else but low.
