Your argument for why a system that relies on everyone cooperating is that some people won't cooperate which means they actually will
The goal of a great system, is not that everyone who participate follows perfectly, the goal of a great system is that enough people follow it for the system not to implode and regulate itself despite the marginal problems.
So.. As you do not seem to want to answer the question, I will answer it for you:
The answer is TRUST in systemism. Not the trust in others, but the trust in the system. That trust is systematical, it doesn't come from interconnected bond, it comes from the inconscious or conscious knowledge that the system is strong enough to take into account the marginalized incident.
On the road, you don't have to get a cop every streets to follow the rules, and even without a cop and without the justice system, we would STILL find a way to uphold the circulation system.
The reason for this is the knowledge and trust that a good system, even unchecked, creates good behaviors.
And underneeth that affirmation, we have the point of our disagreement. From my point of view, you seems to have a essentialized vision of humanity : "people are like this, people are like that", reenforcing the idea that somehow, we are only facing capitalism because of somekind of "bad nature".
We believe (and frankly know) that
humans have no nature outside of the evolutionnary instinct and a few genetics necessecities:
- The need for cooperation
- The need for sociability
- The need for survivability
- The need to understand quickly others (creating our empathy)
We have no "good" or "bad" nature. We are a social specie that needs cooperation and social bonds to strive. And trust me, I know what I'm talking about here when I say that the absence of social bond will enventually destroys one human.
Based on this underestanding we know that
systems will forge behaviors. If you trust going out on the road, it's because you have enough reason to think that you will survive the system of circulation no matter if the police is here or not. It's is
a systematic trust based on collective cooperation.
Communism or anarchism are the same thing. No one is denying the fact that bad apples can happen within thezse system, but to compare a collective cooperation like both of these system with and under capitalism and saying that they "will not work".. is like comparing your current circulation system with a system where 95% of the population acted like in a GTA game.
No matter how many "bad apple" we will get in a stateless and classless society, we know that the negative cursor of such systeml will always go beyond the positive cursor of the current one. As such, to us, not trying to aim for such a system is completely irrationnal and suicidal.