" In the capitalist mode of production the working class are indeed forced to sell their labor on the market"

You have options, its just that working is a whole lot easier than being self-sustaining but co-operating with like-minded people is a third option - Like the agorist collectives that did/do some pretty cool stuff together and live in a counter-economy.

Again, agorism can't compete on the effectiveness of a market economy by any means but it doesn't have to: Supporting yourself and your friends through a network and working towards personal goals outside the state-controlled economy and having a more fulfilling life as an effect is much more valuable.