Yes, people make mistakes and cause accidents.

We have the legal system so an injured party can sue the driver if they are injured or disabled.

In this trial, all they are asking for is that the auto pilot manufacturer be held to the same standard.

You cause an accident by manually driving, you are legally liable.

You release auto pilot software that causes an accident, you are legally liable.

Everyone should be responsible for their actions. Seems like a very reasonable standard to hold everyone to.