The show is also about a space navy that has near total autonomy on the frontier, securing the interests of the Federation while inducting new worlds into its ranks, with our heroes being the Good Guys who are high ranking officers in the military who give orders and investigate conspiracies and hold life and death in their hands as they fly around their heavily-armed “totally not a warship” exploration vessels.
It’s very Space America, and at times almost libertarian in its politics and non-interference. It’s not even explicitly socialist, all we know is that they don’t use money, except when they do. The writing is sort of fuzzy on the matter, which results (regardless of the intention) in an economy that doesn’t actually seem that different to our modern day in practice. There’s no money, but people still own businesses and talk about buying stuff, which allows for the economic system to fade into a sort of forgettable background space.
Besides, Star Trek isn’t necessarily about a socialist future. It’s about a post-scarcity future. I think that’s a key difference. I’ve spoken to many conservative fans who say that they believe that capitalism is the only way that we can achieve a post-scarcity future, i.e. invent replicators. Because Trek isn’t about a worker’s revolution, it’s about the slow progression of technology, followed by a nuclear war, and then at some point they just sort of got rid of money because it was obsolete. All we even know about it is from one-off lines.
It makes me think of the Culture series, another sci-fi universe I’m fond of. It’s even more leftist-coded than Star Trek, yet somehow Elon Musk is a fan of it and names his rockets after ships from the books. Apparently Jeff Bezos is a fan too. Ugh. And as a result, a lot of people’s first introductions to the series is through these awful people, since it’s a lot more niche than Trek.