"But isn't it fun to think that communism could be made possible by the productive powers of capitalism?" In fact semi-socialism can't exist without capitalism. As the Iron Lady said, "The problem with socialism is that you eventually run out of other people's money.”
It can be fun to think about it but implementing it always runs into the maxim, "In theory there is no difference between theory and practice. In practice there is."
And it all boils down to one question: who decides? Does a government bureaucrat decide what is best for you are do you decide? When you make the decision and it is wrong, you can correct it. When the bureaucrat makes the decision and it is wrong you are stuck with their decision because they will never acknowledge that they made a bad decision.
Who decides whether you are what you make yourself or you must become an air conditioning technician because your country needs more air conditioning technicians?