An Apple SIM is not a soft SIM and it requires a non-Apple network
"...and Apple included a "soft SIM" option in its latest iPad. This allows the user to select from a list of operators (and switch between them) when activating the device, passing the control from the carrier to Apple."
Wrong - Apple's SIM is not a soft SIM, it's a simple physical multi-IMSI nanoSIM (with limitations e.g. AT&T swap restrictions) still requiring network and suscription support from a participating MNO. The Apple SIM can still be replaced by whatever SIM you prefer so control has not passed from the carrier(s) to Apple. Apple has other means to put the pressure on carriers such as 4G network certification and commercial terms for the promotion and sales of handsets. Or is Apple thinking about becoming an M(V)NO?