Bluetooth file transfer is not accessible enough for non-technical people? I mean I guess you have to mark the device you want to send to as "discoverable". If anything the real problem is that it's not very fast, but that's only an issue if you are sending particularly large files. This is still often my go-to solution aside from Tailscale's Taildrop feature.
It's incredibly difficult. Do you have any idea how "non-technical" these "non-technical" people are? I know people that use phone every day to make calls as send messages, take photos, browse Facebook, read emails and they could not send an email with a file attachment to save their life. Asking that kind of person to:
1. Enable Bluetooth and make device discoverable
2. Enable Bluetooth on another device.
3. Pair the devices.
4. Find an option to send the file
5. Accept the file in another device.
6. Wait for the file transfer to finish.
7 (bonus). File transfer failed for some reason and you have to start again.
It's simply impossible.