That I strongly disagree with. I imagine lightsaber training is an essential part of Jedi discipline - do you think that guy in the YouTube video canofhumdingers posted fights swordsmen regularly? No. It's a meditative thing.
Besides, if Jedi Knights were "guardians of peace and justice in the galaxy," I'd imagine they'd need a weapon, and they'd need to know how to use it. Plus, I'd be shocked if there were no Jedi that went "bad" over the years - knowing how to duel against someone else with a lightsaber would be essential in the event that this happened.
On another note, I hate that the prequels made no distinction between a Jedi Knight and a Jedi Master - they were merely ranks in the prequels. Before the prequels, I'd always assumed that Knights were the warriors with lightsabers, and the Masters never used weapons of any kind, and were the wise old ones in tune with the Force who guided the Jedi Knights without fighting themselves. Obi-Wan was a Knight, Yoda was a Master.
Yet another missed opportunity for the prequels.