From an early childhood memory, aka Atari 2600, and the dawn of home computing:
Gah, we couldn’t afford joysticks for the home computer and proper flight controls (not to mention software) was not available to the home computer market. Thus we were limited to using the keyboard.
Bottom Line: Why aren’t keyboards included in this category of “game gear” and vilified in this manner? (Answer: They are too commodity and as mentioned by @WoolyBugger to inherit both the economies of scale and to greatly reduce the learning curve by capitalizing on their early childhood muscle memory when training the personnel on their use.)
