Imagine a community of workers who, through ground-up organizing (say, through unions or mutual aid networks), collectively overthrow the bourgeoisie and seize the means of production. The bourgeoisie need to be prevented from taking the means of production back while the workers implement communism, so the workers organize a militant force that, through consensus, can be temporarily spun up to defend the revolution--but only for as long as everyone agrees the defense is necessary. Then the reactionaries are kept in check, but the power to perform this subjugation is firmly rooted in the will of the people, without the risk of the power becoming disembodied or consolidated in the hands of the few.
Obviously there are lots of immediate concerns about this (how do you ensure reactionaries don't throw a wrench into the whole thing, etc.). But this is where I think more imagination is needed. Surely it's possible to solve these issues without giving up on the idea that power should be fully in the hands of the proletariat and not a disembodied structure?