No?
I didn't, I said why would one want to touch all four corners? Please read carefully.
But you did, I have bolded it to make it easier for you to see what you typed;
Please read and remember your own posts carefully.
Understand context. That first quote you took out of context was in reference to you saying people don't want to touch all 4 corners of the display.
The second one you took out of context was in reference to the mini "test" I detailed earlier.
For most day to day operations, you don't need to be able to hit all 4 corners. To use a phone 100% of the time without ever having to adjust your grip, you do need to be able to hit all 4 corners. It is simple. Just understand context.