I don't understand why Apple didn't make FaceTime Audio the default to take precedent over regular cell calls. The way it should be like how iMessages takes precedent over text messages.
Phone numbers are now unified with Apple ID's so FaceTime Audio SHOULD take precedent.
Reteaching how to better place calls to parents is tough especially when FaceTime Audio is so much better quality and free long distance!
No operator revenue = no operators = no phone network = no iPhone.