I think being pacifists wouldn't guarantee they stay away from the dark side. Some Jedi have fallen to the dark side through... wait for it... meditation.
Imagine something like the Krath Cult takes over a system. A few Force-using knights could infiltrate the palace and take them prisoner without causing too much casulties.
And if every military would have some Je'daii among the troops, they could prevent war crimes from occuring.
Je'daii in police functions will help capturing dangerous criminals alive and without too great risks.
And if two planets decide to fight each other, but the Je'daii in the troops of both planets go to the battlefield and start negotiating with each other, they might prevent the war better than advisors could.
The line about ignorance and knowledge is: There actually is ignorance. You should encourage young Je'daii to admit their ignorance and try to gain knowledge.
also: There is light, yet darkness
But I'm cool with different sub-oders in the Je'daii Order.