Perhaps it used to be the case that people had trouble imagining a utopia, but here's two solid utopias (or near enough) I've encountered in fiction: the entirety of Ian M Bank's "Culture"; and the second chapter of Cory Doctorow's "Walkaway". Also, there's the perennial example of Burning Man (and related festivals) - here's an example of people creating happiness that has little to do with the removal of scarcities…
> Also, there's the perennial example of Burning Man Which is a temporary outlet for a select very affluent few Westerners (non-affluent person wouldn't even be able to afford transportation and supplies, not mentioning $500 entrance fee) who drive there for a week (increasingly accompanied by air-conditioned tents and personal chefs), frolic in costumes or negligee, burn stuff down for fun and return to their regula…
I completely disagree with your impression, but that all is beside my point.
The part of the Burning Man culture I'm pointing to is the one where people go co-create all this shit anyway, when they don't have to, when it doesn't solve any need, when it's not about a contrast with somewhere else.
Not everyone needs a problem to solve to get off their arse and make something amazing, and you can see that multiple times a year around the world if you look at these events.