With ships blowing up left and right, would torpedo explosions really make much difference?
Couldn't help...at least if you don't want to be one of the ones blowing up left and right. I don't think most of the ships we saw blow up are having a full explosive combination of their matter and antimatter supplies; impulse overload would be bad, but probably not as bad as a nearby torpedo detonation. You make a point in that the Jem'Hadar probably don't care one way or the other and take any shot they think will kill more of the enemy, but I doubt the Alliance is careless with the close-in torpedoes.
Well, maybe the Romulans