Unappoachable?

I have noticed people who seem powerful, are so with a strategy: They are unapproachable. They do not have an open door friendly policy. You have to choose your words carefully and make sure you get the result you want from a very short interaction with them. Some are genuinely  so due to their position and their very many duties, but at their presence, however short, you feel welcomed and respected. I am not talking about them. I am talking about those powerful people that have an invisible bubble around them. You cannot get to them. You are intimidated by them and scared to talk openly with them.  You feel scared of them, and you sometimes find it easier not to approach them about different matters. They benefit from this. You may lose some benefits or you rights because you did not confronted these unapproachable people when you had to.  The truth is, they are more scared of you. They are waiting for your remarks and as soon as they sense the slightest hint, you quickly see their defensive responses and actions. So do not be afraid, speak up! What is the worst thing that can happen?