Possibilities: Inexperienced young people are made to commit hard and fast to a career path. Once locked in, this choice (in the US at least) often comes with a large financial burden and time. Support is not there to pivot. Immediately after you leave (trade, academic institutions), the culture sets to weighing you down with more debt. By the time you extract yourself from that, it's still hard to pivot because now you're dealing with Ageism and sunk cost (will you recover this productivity and still put enough away to retire?). Even if you decide to bridge that gap, society provides you with absolutely no safety net. The punishment from making the wrong choice as a young dumb kid are harsh.
The "Endless possibilities" is part of the depressing trap. They're _there_, but they're so far out of reach and dangerous that unless you happen to live a charmed life with a deep-pocketed safety net, the risk-reward just doesn't make sense. This is why many in the US want tax-sponsored education and single-payer healthcare, so they can make these pivots and find happiness without having to retire at 80.
On being forced: There is really no sane way to disengage with exchanging labor. Say that I want to drop out and entirely disconnect myself. Say I fully agree to reject the products of society, be alone even unto death, and be self-sufficient. I can't buy a piece of land and sit on it. Eventually the Tax Man will come for me, and if I don't pay, he will take my land, with violence if need be. I cannot go hide in the woods. That land is the property of another or of the government - I will be chased by law enforcement and federal agents. I can't even just ghost through cities who are growing increasingly hostile to homeless populations. The system is powered by violence and coercion, and your only choice is to exchange labor for money. This could be a fair exchange if it lived up to promises. There is a rate where exchanging freedoms for perks makes sense. but a lot of people play entirely by the rules, do everything right, and still end up miserable, trapped and broken.
So yeah, it's forced. If you can't sit back and live on generational wealth or rent on your assets, every job you've ever taken has implicit threat of force behind it. You can make bad-faith arguments about the existence of choice, but choice is an illusion unless the choices presented have a reality where taking that choice makes sense. Cake or Death - what kind of sane person chooses death over cake?
I don't think anti-work is a pit of hopelessness. It's actually far more idealistic in its view that _the pieces are there_ and there are alternatives. Whether you believe that or not is really up you. That this briefly made it on to Hackernews surprised me - Hackernews continues to largely reflect the California Ideology, something that doesn't tend to breed a lot of solidarity outside of its own professions.