The short answer is 'the nature of humanity' I suppose. But I think it often comes from too little thinking, or too much, depending on the circumstance. Almost every complication can be boiled down to that essence, I've found.

[Perhaps an overlong answer, but Hux disliked to give a general answer when he could be specific--especially when it came to something like this.]

They are.

It's what I would do. No point in wasting resources unnecessarily.