Efficiency is everything in a zero-sum war between capitalism and revolutionaries.

You either do shit better than them or you lose. It's really as simple as that. The revolutionary forces need to become strong enough to overcome the defence forces of capitalism.

There are two ways to this:

1. Building a more efficient revolutionary army than the army of the state.
2. The army of the state becoming so resource-stretched that it becomes weaker than the revolutionary army.

Or most likely: A combination of the above.

You can try and be completely disorganised and just hope that the state collapses so fucking hard that it can't even fight a leaderless revolution with no hierarchy. But seriously consider that that isn't going to be allowed to happen by foreign capitalists who WILL intervene when the moment of collapse occurs if things get that bad. More likely things wouldn't ever get that bad too, which is why you need the vanguard to begin with, to push things truly over the edge, to place a thumb on the scales.