Earlier quoted context omitted.
Even if we do build fully-automated and autonomous means to grow/build/create everything we need, identity in this era is still overwhelmingly rooted in our jobs. I am a Developer, she is a farmer, he is a doctor. If all the jobs go to robots, what are we? Ask any jobless person for whom no job exists how they feel about life.
You can still be a developer, a farmer, or a doctor even if you find that you don't require those activities in order to eat.
Perhaps you see yourself primarily as a mother, or an artist, or ...