Here's a mundane example; AI is aligned and used without harming humans. If/when robotics catches up, we will be heading to a world without a need for humans (at least based on the world pops we have today).
Humans _hate_ being useless, and we were already running into surplus human issues last decade in certain parts of the world.
I foresee a depression/suicide spiral never before seen in our history unless we do something radical
Most people that retire don't turn into murderers or anarchists. I find very interesting how people tend to picture the worst possible scenarios, maybe a lot of Movies or TV influence?
A lot of people that retire from their careers pursue other interests that fulfill their needs, maybe it will be the era of amateur artists everywhere.
Others prefer to manually do tasks that can be automated.
Others could engage in cooperation with robots because humans will always have creative desires.
Amature artists doing what? Trying to figure out why human greed is insatiable, therefore they have no place to live?
There are any number of problems that have to be solved together. Giving the capital class hyper powerful AI robots so they can own the world while everyone else suffers is an AI risk.
Plenty of people are quite happy without doing economically valuable work. Maybe most. So this isn't an X-risk in the sense that humans might go extinct. Workaholics may remove themselves from the gene pool, but there'll be plenty of people happily chilling.
Are people's self worth really intricately tied to what they do for a living?
I mean I enjoy my work, for the most part anyway. But if I could spend all my time with my family and hobbies I see that as an improvement rather then something to be depressed about.