Factorio science packs kind of make sense though. E.g. military science packs are made of bullets, grenades and walls, and you spend them to get better bullets

Factorio science packs kind of make sense though. E.g. military science packs are made of bullets, grenades and walls, and you spend them to get better bullets and grenades and such. It's like an abstraction of spending some capacity to experiment on improving designs.