As an EMT, and first on the scene of a patient with a closed broken femur,?

with the ability to maintain traction until a traction splint can be applied, and no contraindications for applying a traction splint, one would apply just enough traction for the bone ends to realign, and possibly be pulled ever so slightly apart from each other, correct? (I took my basic class two years ago, and was in a community emergency preparedness class this last week in which I was told I was wrong in wanting to apply traction so the ends of the bone didn't cut the femoral artery and the muscle before splinting. Instead I should immobilize simple, closed femur fractions with the bones at the angle I found them. I thought that was protocol for every fracture except a femur, and the femur protocol was as outlined above. Can someone clear this up for me?)