Looking at the video, I can see why this was locked down. I wouldn't hand my mother that kind of complex UI.
What's really missing here is the mode where you plug the iPhone into a monitor, connect keyboard and mouse, and suddenly it's a functional desktop-lite in the same way that a basic iPad now is.
Nobody cares what would your mother, father, grandfather, 100 year old cousin, your brother’s slow toddler think about UI. Stop bringing that stupid argument up.
Buy them a feature phone and stop plaguing smart devices.
Are you suggesting that the test for whether they should “allow” a feature is whether your mom can figure it out?
Why?