Well then I would just use cheat engine. After playing this game for 100+ hours. I would not like being completely limited, especially that they are making o2 in the Seamoth limited. That's going to be EXTREMELY annoying.
Everything is an evolution in this game, you get your beginning stuff, then late game oyu have upgrades to you original items. It would only make sense to get a normal gun for an upgrade to a knife. Even getting a spear.