Isn’t it wild Omni-man is able to slice other Viltrumites open with his barehand? Imagine if humans were able to do that to each other, the Viltrumites have an insane amount of trust amongst each other. It also seems to be Nolan’s favourite move as well lol.
Sure it’s necessary. It gives her range. Maybe all the top level soldiers can do it with their hands or maybe they all can period… but she has the ability to do it with range. It shows that there exists metal that can cut them rather easily… at least in their hands.