In such a system, people work on what they want, when they want, and provide for society because it's their true desire.
I find it kinda hard to believe that people would be able to achieve the level of organization and would be willing to put in the effort required just by doing what they want when they want, without any outside incentive. I'm not talking about a painting or a book, that's why I specifically mentioned things requiring large investments. And by investment I didn't mean just money but time and effort in general.
I just don't think the majority of people are motivated enough. I have met many people who have no hobbies and no ambitions and just don't want to do anything productive. They would like to spend their entire lives playing video games or partying or something similar.
And this is just about the lack of motivation, but what about malicious actors? People who would sabotage other's efforts or try to profit in an unfair way? How would you ensure this won't happen?
What about shitty and unpleasant but necessary jobs no one wants to do?
The idea that once you remove the money everyone will suddenly feel the desire to serve the society is bonkers. Don't get me wrong, I don't love capitalism. I want to believe the world like that is possible, I really do, but I just can't see it working. I live in a society where I have to use a 3 kg bike lock in order not to lose my bike and even then I have to detach the $10 light and take it with me because otherwise it won't be there when I come back. I have zero trust and belief that such society can magically self organize and work together towards a common happiness.