They will still sell the products they produce in a marketplace.

There is no rule that states they have to sell squat in a marketplace. They could, but they also couldn’t. That’s the whole point of the workers owning the means of production - the workers involved makes those deicisions, not a capitalist or bureaucratic parasite class.

Musk is doing more to make people realize how garbage capitalism is than Marx ever could.

think communism is what we should be striving for.

Simple - it’s the ideal. Will we ever get there? Possibly not. Is it even desirable? Debatable. But it’s always better to know where to go and not know how to get there than having the option of going anywhere and not knowing where to go.