“Star Trek is definitely Communist (or fascist).”
Disagree. What about it is communist or fascist? The economic system in Star Trek is not like anything we have now because there is no real need for money. All basic human needs and wants can be created out of energy, and energy is essentially free. People dont need to work, but just about everyone does for personal fulfillment (in real life few would bother to get off the couch). There is a govt and an exploratory/defense force (Star Fleet) but role and workings of govt is not made clear. It certainly doesnt seem oppressive and everyone seems to be free to do what they want (within limits).
As has been said elsewhere, “Someone has to mine the dilithium crystals.”