Marxists aren’t ignorant of prefiguration, we agree with some of it, such as building dual power. We don’t agree that doing so erases the basis of class, and thus doesn’t also erase the basis od the state. Marxists in general take the opposite approach to solving class struggle, believing in collectivization of all production and distribution to suit the needs of all, rather than creating loosely organized communalist cells, and this is because of analysis of class struggle being different for Marxists (and I believe more correct).