Why not? Would the ability to manually set off Dead Man's Switch Z's really be OP? Or to TL one of your own ships and fire an assault missile at it to better control splash damage?
Would the ability to potentially sacrifice one of your ships to trigger ACD with no other target in arc be OP?
Or intentionally attacking one of your ships in range one of an enemy ship with Ruthlessness and giving the enemy ship an auto damage?
Is it just a theme thing, that it wouldn't make sense thematically? From a game play perspective, allowing it would open up some interesting dilemmas and options for list building and tactics. I can't really think of anything that would suddenly be OP should it be allowed.
You could fly a Lambda into things and pretty much just auto-hit your assault missiles onto it for a moving wall of splash damage. That seems viable but not OP. Seems pretty fun.
Edited by ParaGoomba Slayer