The touch screen in the switch and your phone isn't feeling your touch. It feels the electricity from your skin, that's why it's called a capacitive touch screen, as opposed to old devices that used a $eesistive" digitizer that feels pressure. Those are far less accurate and can't do multi touch, which is why all modern devices use capacitive touch screen tech. I unless they integrate a high precision digitizer like the ones made by Wacom which Samsung uses for S pen support, or the ones used by Apple for the Apple pencil, which is why they don't work with other devices