The reason the rules are this way is because on the old console versions of this game, saving takes quite a while, and thus making it faster to have no save file. Your run wont be rejected if you have a save file, there's just no practical reason to have on. Also, for other questions, please use the discord server since its very rare that any of us check these forums. https://discord.gg/Ftgcsgqw

Since when were src comments a thing