I am not a particularly adventurous person. For example, I would never, ever go skydiving. I have however, been swimming in the ocean once. I can’t say I entirely enjoyed the experience. I’m glad I did it, and it was a great experience, but I wasn’t ever completely happy about being there.
That’s because the ocean is a scary place. Floating in an expanse of seemingly endless water, knowingly surrounded by life that can move much faster and more gracefully than you that may, at any time, want to investigate your level of tastiness, creates a very daunting atmosphere.
Of course, I could leave the ocean at any time. I wasn’t trapped there. Whilst Earth’s oceans do contain dangerous sea creatures, I was no where near exploding fish or leviathans the length of two football pitches. I also didn’t have to arrive at the ocean on a crashing space ship. All these things would make the ocean much more terrifying, and part of the reason why Subnautica is such a fascinating game.