Thank you for your interest in this joke mod.
I have taken your input into consideration and have removed recipes with the "smelting" category from recipe modification, which should allow smelting of at least iron and copper ore into plates; since it does appear that smelting machines don't allow more than one input.
Full disclosure, not much thought has been put into this mod as a serious playthrough, considering I do not know where you are planning to get all the fish. If you encounter other issues that the addition of fish to recipes prevents something from being producible, let me know and I'll see what I can figure out.