Why is FaceID so great and how is it more convenient... I never pick up my phone and not look at it so it's natural and I'm logged in immediately. If the phone is set down, I typically only use things I can get at in the lock screen but I agree that there's times where I don't want to pick it up but have to. However, this minor inconvenience that happens maybe once a day is overshadowed by the speed and accuracy of FID vs TID the 30-40 (guessing) other times I log into my phone in a day. Of course everyone may have a different experience as seen in plenty of posts here on MR but mine is that FID is faster and more accurate than TID and my face is impeded less often than my fingertips are. I'd have to resort to the password with TID maybe 5 times a day and I have to resort to the password with FID maybe one time a day.
Yes, there are settings for FID where you can disable it for logging on. Also, if you were to wave it at your face for 3 seconds and it didn't recognize you, it'll ask for the password (just like a failed TID logon). There's another way to do it with buttons but it's not quintuple-clicking the lock button (I nearly just placed an emergency call) - I guess that's how it's done on TID phones. for the X it's like going to the shutdown/emergency call screen by holding the lock and one of the volume buttons, then hitting cancel and entering the password to log on. Writing this reminded me of another post...
Wouldn't your family member just enter the passcode? Is it that important that the secondary users of your personal device have touch or face access? If your condition requires the potential extra 3 seconds it takes to enter the password instead of the fingerprint AND assuming that the fingerprint is accurate enough that it never takes the other users a second or third try to log in, then I completely understand your need for an alternate user's immediate access... But I'm still skeptical that you'd depend on TID for that instead of learning to quickly unlock with a passcode.