aha! The CSM are not dedicated to a greater 'good' like the Imperial SM are. In fact the CSM fight for their own benefit, and where's the benefit in last stands when your certain to die?
A Space Marine would willingly throw his life away if ordered conversely meaning he's harder to eliminate as he doesn't fear death whereas a Traitor only has the endless torments of the Warp waiting for him when he dies so he probably wouldn't be too eager to take his last breath any time soon. |