The problem is that as of now it's an utopia, i.e. a hypothetical state of the future. We cannot know what it will be like, whether we'll achieve it or what we'll actually achieve. We can only choose to either move forwards by working towards it or not contribute towards it.
Not surprisingly, this is how humans behave, have always behaved and how the society as a whole works. We are motivated by some particular things or visions and choose to work towards some of them, and ignore others. After all, we cannot do everything, so we need to choose from whatever options we have, or whatever we need to do. But we cannot know for very sure, what our work and living actually contributes to, especially in the big picture. The big picture is too complex and we can only try to understand it and how we contribute to it, but we cannot know for sure what we'll, the humanity or the society will end up with.
The many technological utopias have some parts that are very feasible based on current knowledge and technological infrastructure, but for example the abolition of work is, I think, more of a dream and bears little realism (you can study for example, how limited automation actually is, plus, it doesn't necessarily make our lives more enjoyable). In any case it would take a long time to develop and build all of that technology. Plus, it won't necessary, or most likely it will not solve our current problems (e.g. social, environmental), because those we could solve without the technology utopia as well. Social and environmental problems of today are mainly political, interpersonal and about caring, not necessarily about technology.
This is a complex and layered topic/issue really. But generally I think it's advisable to not believe in what you cannot see (i.e. believe in utopia or something which does not yet exist), because that's sort of like following a religion, but rather believe in current facts and the current state of things that can be verified and perceived to some extent. And work towards improvements based on current knowledge, not based on some utopia. In general, work towards something.