Comment by luffy_t

Because it feels like you are building something but you are not. The problem solving in factorio is just tedious like doing manual calculations and you spend a lot of time doing this. It satisfies the problem solving itch for people who haven't faced any challenging problems in their work. Once you start solving these problems in real life factorio just seems pointless. Dont get me wrong i like paying pointless games that require very little to zero thinking (Muscle memory based) that I find satisfying. Factorio is just tedious.