I have wondered this on and off for years, and was prompted to find out the answer:
Any time I've seen capacitors, they're listed with milli- or pico-Farad ratings. I understand that, nowadays, we have special purpose supercapacitors that package "whole" Farads into single components.
But, why on earth did "they" use such a large base value that for "most" applications you'd need something in the milli- to pico- range? It just seems ... unnecessarily skewed.