In a tactical environment the problem with clustering is that modern weapons will quickly take out everybody. There needs to be some space between people, maybe a couple meters.
The problem with a lack of initiative is that it undermines security. If you don’t know what you should be doing then at least you can secure part of the group’s perimeter by seeking cover and looking outward until told otherwise.
Sure, but I don't think you're talking about "logic" as such. It is more a matter of thinking about the conditions of the environment.
IE, you're talking of specific skills and understanding as if they were a general thing, "logic". Not that I'd disagree with comment about what should be done.
The problem with a lack of initiative is that it undermines security. If you don’t know what you should be doing then at least you can secure part of the group’s perimeter by seeking cover and looking outward until told otherwise.