Do you still remember something called anti-scratch Tempered Glass?
Those old-fashioned screen protectors, the ones that stick out on the screen and make a thin phone feel like a thick old-school phone, especially when installed front and back. If it is hit a little it will break, sometimes it will crack even when it is being installed, and it is difficult to remove once it is broken. There's no need to talk about the screen sensitivity, it feels like an old-school cellphone touch screen. Not to mention the reflection makes the screen difficult to read outdoors.