An interesting article and a question in it is relevant! I think that the question of utopia is the question of the social norm and social values. In every society there is a majority - "normal people" - and there are different groups of people who "wanted strange", or, more roughly, marginalized people. Utopia turns some of the variants of "strange" into normal, and yesterday's "normal", on the contrary, becomes exotic. Utopias are not needed to immediately begin to implement them, destroying dissenters and spending on it all the resources of mankind. Utopias give value, meaning and direction to our world, which will never be ideal. Thanks @humanearl for the great post!