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There's something I remember from an old sci-fi documentary in the 80s that used old Flash Gordon serials as a reference for what they were saying: that the audience expects certain sounds when things happen onscreen. At the time nobody knew what a spaceship landing sounded like, but they DID know the sound that something big and heavy dropped into dirt sounded like, so that's the sound effect that was used when the spaceship landed. And something exploding makes an explosion sound, so even if the explosion onscreen was happening in space, the audience is expecting an explosion sound.Target demographic is the only thing that matters. The general public wants to see things fly like an aircraft, not a technically accurate depiction of a space craft.
They extrapolated that further and said that now you would have a more realistic sound for a rocket taking off, not because of technology, but because audiences now know what a rocket taking off sounds like. And in the future when rockets taking off sound differently, we'll look back on the sci-fi show as being quaint for using that sound.