Have you tried using MetaMask or WalletConnect as a sign in tool? It's great. The extension pops up with a message indicating the app is requesting access to account. You click yay or nay. MetaMask already has millions of users and growing rapidly.

Average people didn't know how to use email 30 years ago. Didn't know how to use GPS 20 years ago. Didn't know how to use social media 15 years ago. Didn't know how to hail an Uber 10 years ago (and still thought riding in cars with strangers was dangerous).

I think they can be educated.