you don't want your car to refuse to move when you are stuck on a railroad crossing despite the gate in front of the car being down. there must always be a way to override the autopilot.
Moving off a railroad track at what maybe 15mph max is very different than doing 70mph down a cut de sac double the posted speed limit. I am not saying FSD should prevent any forward movement, how fast can it go in reverse? Probably something like that.
The design philosophy is that this is driver assistance where the driver is the supervisor, rather than the car supervising the driver. Sustained acceleration is interpreted as the driver overriding the car. For unsupervised autonomy in the Cybercab they remove the ambiguity by removing the accelerator pedal.
I guess that seems ridiculous to me. I could understand if its some sort of government regulation, but if you want to ram a house or anything else or go double the posted speed limit then you should be required to disengaged FSD and go manual, obviously.
There are plenty of videos of stuck vehicles that have a hard time due to traction control disallowing power even with full accelerator pedal, this is not a foreign concept in a modern vehicle. Here is one example, they refer to traction control as the soup nazi, no power for you! : https://www.youtube.com/watch?v=WLVae7-N_Vs
It's a feature to look for in a off road vehicle if it has a traction control disable and even ABS disable on motorcycles, this is an explicit command to disable a safety feature that typically resets when power cycled. Not sure why FSD would allow overriding an obviously unsafe situation, the operator can disable the whole thing at any time if they wish to do so and go manual with a specific on screen command rather than hitting a pedal right next to the other stop pedal with your foot resting between them otherwise.