I just hate it.
No, I don’t want to stop what I’m doing to stare into your face on a screen as we chat.
No, I don’t want all the vicinity to be subjected to our conversation, or faff on finding headphones.
Why does everyone seem to be obsessed with FaceTime!?
I just will not do it which some family members think is odd and unfriendly. I will happily phone chat for as long as they like, just not on FaceTime.