"...don't they always tell us that you can do more, with less?"

I think the Wehrmacht tried that argument in WW2 with the Tiger and found out that the much cheaper, less advanced but considerably more numerous Shermans and T-34s didn't support that.  No matter how advanced a weapons system, unless it can take out multiple targets with a single shot there is always the good possibility that more of a lesser system will get thru and destroy it. At least, that's what military history should be telling us.