Is Sharing Control Really Safe?

When you're using these kind of technologies, is this actually safe to use? I mean, whether or not it's the non-invasive methods. So what I've been working with a lot in my group is something we call shared control. With shared control, it means that the device itself has some level of artificial intelligence and cognitive processing abilities. And so for example, if we're driving a wheelchair, we've developed a smart wheelchair that can understand the environment. But it's not self-driving, because there's a human being that's controlling it just that they're controlling it using a brain computer interface.