For me it is like this for todays game:
Primary option - training! Of course :)
Secondary - XP.
Third - avoiding injuries
You prefer avoiding injuries over that minimal gain in XP and it is fine. Majority will follow your choice. But there is another option:)
And I dont mind them to get injured in this game. I had couple of injuries in scrimmagies and I still like to dress my players for the first scrimmage of the season. 5 of them today. Two for training, 3 for EX.
Chances of injury in this one are still bigger than the added XP, so if it's your only reason, don't do it :)
You cant compare such things :) It does not have same measure. So it is always biased by preferences :)