The misunderstanding is in believing that either you have a one-shot revolution, revolving to a golden age of equality, or rather installing it through a well engineered new society (l'Ordine Nuovo, the New Order, was the title of the Communist Journal founded by Gramsci and Togliatti), or you have no way to escape capitalism (or whatever we call present-day oppression: managerial feudalism, as for David in Bullshit Jobs - https://theanarchistlibrary.org/library/david-graeber-bullshit-jobs#toc37 - did, or technofeudalism, as for Varoufakis - https://www.yanisvaroufakis.eu/2021/07/05/techno-feudalism-is-taking-over-project-syndicate-op-ed/ ).
Instead, I more than welcome David Graeber & David Wengrow realism in remembering us that revolution is a process, and we'll never be allowed to stop fighting oppression, even in our groups and inside ourselves, and, on the other side in showing us that not just another world, but many other worlds are possible, and how they exist and are being built right now (the ethnographic research both on egalitarian societies and on activism, revolts and revolutions was a very important part of David's work).
What's even more important, and was in my opinion David Graeber fundamental endeavour, is the fact of pointing out how, even if we can't (and shouldn't) count on a one-shot revolution engineered once for all by The Party, we can, and should, stop making capitalism, because "the hidden reality of human life is the fact that the world doesn’t just happen. It isn’t a natural fact, even though we tend to treat it as if it is—it exists because we all collectively produce it. We imagine things we’d like and then we bring them into being. (...) If we woke up one morning and all collectively decided to produce something else, then we wouldn’t have capitalism anymore. This is the ultimate revolutionary question: what are the conditions that would have to exist to enable us to do this—to just wake up and imagine and produce something else?" (The Utopia of Rules, https://theanarchistlibrary.org/library/david-graeber-the-utopia-of-rules )
What's even more important, and was in my opinion David Graeber fundamental endeavour, is the fact of pointing out how, even if we can't (and shouldn't) count on a one-shot revolution engineered once for all by The Party, we can, and should, stop making capitalism, because "the hidden reality of human life is the fact that the world doesn’t just happen. It isn’t a natural fact, even though we tend to treat it as if it is—it exists because we all collectively produce it. We imagine things we’d like and then we bring them into being. (...) If we woke up one morning and all collectively decided to produce something else, then we wouldn’t have capitalism anymore. This is the ultimate revolutionary question: what are the conditions that would have to exist to enable us to do this—to just wake up and imagine and produce something else?" (The Utopia of Rules, https://theanarchistlibrary.org/library/david-graeber-the-utopia-of-rules )