A world without Fi, to me, is a world without purpose. Without meaning. Without an understanding of the concept of beauty. Without knowing who you are, or what makes you happy, what brings you joy. What makes life worth living. A world without deep understanding of one another, without feeling intensely, without learning how to walk through the dark abyss of your own emotions and learn from standing amidst the fire. For that matter, it's a world without wisdom and insight in who we are as a species and as an individual. It's a world without inspiration, without motivation, without artistic beauty...without guidance.
To me, a world without Fi is a world without the Life Force that drives us.