Rick said at 8th min mark that we have to deal with the event on the animation because like that is the asset pack. If you duplicate the animation then you can edit it (add or remove keys or events in this case).
While this is true, it’s often simpler to work within the constraints provided by an asset pack. The full Explosive asset pack has over 1000 animations in it, all using Hit and Shoot events in them. That’s more time than I ever want to spend changing events.