Here's why:
* The Jedi Order is ancient: The Jedi Order predates recorded history in the Star Wars universe. The earliest known Jedi, like the Progenitor, lived thousands of years before the Skywalker Saga.
* No single founder: The Jedi Order didn't start with a single individual. It evolved over millennia, with different individuals and groups contributing to its development.
* Focus on the Force: The Jedi Order's core focus was on understanding and harnessing the Force. This suggests a gradual understanding of the Force rather than a single "founding" moment.
So, while there may have been individuals who played significant roles in the early development of the Jedi Order, pinning down the "first" Jedi Knight is difficult.
It's more accurate to think of the Jedi Order as a continuous and evolving institution with deep roots in the history of the Star Wars galaxy.