I wonder if it’s because they realize that roleplaying revolutionaries does nothing to advance the working class, and that the main job right now is to pull the populace left and organize labor so there CAN be a sustainable socialist future

Is that what they call their system that is spiraling backwards in many ways- engaging in "forever wars" and provoking WW3, destroying the biosphere and directly contributing the deaths of tens of millions from preventable causes and exacerbated climate catastrophes alike, trying to maintain their monopolies*, reserve currency*, and hegemony over the overwhelming majority of humanity rather than accepting equality and thus engaging in diplomacy and cooperation?

not to live out your wildest ML fantasies where you get to shoot all the anarchists and exile all the Whites?

And by this... they mean, the "ML fantasies" of self-defense against those who at some point will refuse and actively work against and attack the creation of state systems or even just complex organizations that are necessary to resist and put an end to the aforementioned system. Whether due to issues with the concept of hierarchy in and of itself (anarchists) or due to... preserving their supremacy (racial, ethnic, material, sexist, etc).

Leave us alone and we'll leave you alone, no one cares about the genuinely apolitical. No one gives a shit if anarchists want to start their "not-state" communes in the middle of the wilderness, or if white people are willing to live as equals (or otherwise want to go start their own "racially pure" communes in the wilderness and inbreed to death in peace without disturbing anyone else). People generally won't even care if someone has been or remains bourgeois, so long as their heart and thus their actions are in and directed towards the right place (Engels was a industrialist, Armand Hammer was "Stalin's favorite capitalist" and had an estimated net worth of $800 million by his death in the 1990s). The white liberal persecution strikes again.