It doesn't seem to apply to dwarf fortress or minecraft.
If you just mean that your game won't be a hit, that's a risk no matter what you invest in it, whether it's long nights in your free time or a 100 developers and artists and several years.
But I think Dwarf Fortress and Minecraft are examples of breaking out of the mold of big AAA titles laden with creative assets and a heavy script, which are closer to interactive movies than DF and Minecraft.