My non techsavy mother has been using Linux mint for about 4 months now without problems after decades of windows. She’s been retired for years.

Just saying, it’s possible. It’s even quite painless.

I like the idea. But vnc helps with troubleshooting because you can see their screen and walk them through steps so they won’t have to call you again. Thats much harder without visuals because quickly everything becomes “this thing over there”, frequently changing frame of reference.