Because I strongly doubt any political change will get everyone to work for 'common interests', and a fair few product creators, service owners, artists and others will try and sell their work anyway.
How do anarchists plan to avoid this? What about the people who don't want to own the means of production and are perfectly fine with working for others for a wage? What would stop people competing with each other to get more money and resources?
Of which we already have a great example in FOSS.
When did anarcho-capitalists stop being anarchists?