Absolutely. I said it the last time this was posted, that this is an extremely common wreck with every model of car. About half of the drivers in my family growing up caused an accident this way. People press the accelerator when they think they're pressing the brake. The car goes faster, so they press the "brake" harder.
And even after the crash, the driver often insists that it's a problem with the car.
It's a driver error. A foot misalignment problem. It probably does happen more with any "self driving" car or anybody who uses smart cruise control, because the driver may not be using the pedals at all before the incident.