I haven't read all the comments here, but I'll chime in here, as I'm the main reason we don't have violent/weapons in the game.
Subnautica was being birthed right around the time of the Sandy Hook shooting. This was a particularly nasty shooting, although many people don't realize America has school shootings every day. Every. Single. Day.
(5/8/16 UPDATE: I meant to say "mass" shootings, not "school" shootings:
http://www.gunviolencearchive.org/reports/mass-shooting and
http://www.gunviolencearchive.org/reports/mass-shootings/2015)
Yet, for reasons I cannot understand, our people and the corporations that influence our country want to continue making it easy for people to get, carry and use pistols, semi-automatic and fully-automatic weapons.
I've never believed that video game violence creates more real-world violence. But I couldn't just sit by and "add more guns" to the world either.
So Subnautica is one vote towards a world with less guns. A reminder that there is another way forward. One where we use non-violent and more creative solutions to solve our problems. One where we are not at the top of the food chain.