Yea, but not all of them. The particular of what group managed to gain power for this fleet, and by what method... can vary. It could be a mostly incompetent that achieved the post via ferocity, or it could be someone with a more strategic bent.

And there is definitely one much, much, much more prevalent view of khorne and his worshipers in this setting than the more strategic and martial nobility view. I'm not denying that what you say is true (though it's the first I've heard of it!), I'm just saying that it isn't the main way of doing things.