You don't need communication skills to climb the ranks, you can be horrible at communicating information as long as you are great at playing politics and telling people what they want to hear you will be much better off than the people who are good at communicating. Sadly most people mix up the two and think that politicians are great at communicating, but what they are great at is manipulating people not communicating information to people. Trump is a good example of this, he has horrible communication skills but he is great at politics.

This is my experience at least, people are equally bad at communicating no matter what role they have, since communication skills doesn't get much appreciation anywhere in any role.