At the point he wields a lightsaber people are going to assume that he is a Jedi, and Petro has confirmed that he will not be. Him walking into combat with a light saber would be suicide. We know that wielding a lightsaber does not make one a Jedi. Heck, even Han Solo wielded one in ESB. But when you are dealing with the general public (the kind that don't understand how freaking out of place the A-Wing is in this timeline, wonder what the heck a "Broadside" is, etc), you need to be more careful than that. Besides, what does his training have to do with anything. We can't train Jedi in this game.