So? Ever since the industrial revolution new technology has obsoleted jobs. 98% of us used to be farmers. Excel put gazillions of book-keepers out of work. But we're still at basically full employment: there's thousands of jobs now no one could have conceived of 50 years ago, or even 20 years ago. Self-driving cars (if indeed they actually materialise) will be hugely transformative for society, and create whole new businesses and industries, i.e. new jobs to replace the old. Progress fundamentally relies on this "creative destruction", without it we'd still be in caves scavenging for nuts and berries.
Edit: it's kind of bonkers that pointing out the basic mechanics of technological progress is getting downvoted on a site like HN, where I imagine most of us are gainfully employed trying to do just this.
Edit: it's kind of bonkers that pointing out the basic mechanics of technological progress is getting downvoted on a site like HN, where I imagine most of us are gainfully employed trying to do just this.