Why?
Because societies that don't embrace it will be at an economic disadvantage. They will not be competitive with those that do. Who wants to compete with their dishwasher? I'd rather let my dishwasher wash the dishes than refusing to let it take one of my jobs and somehow threaten my value as a human. Basically AI will give humans the opportunity to allocate more resources to more interesting problems. We'll never run out of problems to solve. So I hope AI displaces a lot more than 1/3 of all jobs.