my opinion on kindreds ult

To me honest I don't understand Kindred's ult. The fact that it not only make you and you're ally's invincible and heals them after 4 seconds but does the same for you're enemy, which to me makes no sense why would you have an ult for a champion that helps the enemy to a certain extent?. Yeah i'm still learning about the character but it doesn't make since. It strikes me as odd to know that the ult kinda has no purpose. Why cant it harm your enemy's and keep your ally's protected? that would be much better.