Yes I agree with you, I only call it false data because the ADAS sensor is replaced with OpenPilot. I tried OpenPilot with my car without ADAS and adaptive cruise control and you need the extra wire for the module to give false pedal position and trick the steering. I only stopped because I am afraid to break my daily driver, but it does work and it's amazing.
Steering or gas or brake ECUs on older cars without fancy adaptive automatic thingy don’t accept remote control, units in such cars only take analog user inputs and only report statuses on the bus.
Since ADAS is complicated and developed independent to the rest of the car, car manufacturers expanded those actuators to incorporate remote control mechanisms, and ADAS systems are implemented as a self contained computer that send out those control messages. Sort of like a Raspberry Pi with the camera in a case that is advertised as an “Ethernet AI camera”.
Openpilot on officially supported cars impersonate those ADAS unit. They are not directly meddling with pedal potentiometer readouts and such. That kind of rigging are used in some lab experiments but not in the majority of OP driven cars.