Indeed not, but I think specifically with Star Trek it has this veneer of false hardness because it makes such extensive use of scientific terminology and concepts. I think that is why so many in Star Trek fandom are obsessed with "hardness". I doubt people in the Star Wars or Babylon 5 fandoms feel the same way, precisely because those franchises don't make a point of pretending to be harder than they are.
But we are talking about a Franchise that from it's very beginnings had Mobster planets, alien-hybrids and green skinned space babes.
(I'm not mentioning the warp drive, because I'm not well versed in the theories on that and have over the years read stuff that claimed that it was possible and stuff that claimed that it was impossible)