The "work less" notion seems based on the idea that the only kind of work we can do is to keep the 20th century going. Once that infrastructure is automated, there's nothing left to do. That's just not true.
AI can help us explore space, mine asteroids, discover new worlds. It can eradicate diseases. It can create portable tests for transmissible diseases. It can help us rebuild cities into green spaces with fruit trees, gardens, flowers.
We have this incredible new technology that can let us reshape the world into an incredible future. Why would we settle for anything less than Star Trek?
The possibilities aren't ending with AI; they're just beginning.