Yes, it is crazy. I guess this isn't really the place for it but ... From the official docs:
The Figure is the final image that may contain 1 or more Axes.
The Axes represent an individual plot (don't confuse this with the word "axis", which refers to the x/y axis of a plot).
This is infuriatingly bad and I firmly believe that it makes sense only to people who already know how it works. There's an image, axes (this word alone is a crime), plot, figure... it's like they took a bunch of synonyms and arranged them randomly to put together an API.