Because the grenade did literally like 180 damage out of someones 200 hp so you could finish them off with a slight tap of gunfire with any gun. It was abused like hell in trials. You could wear the voidfang vestments and use your grenade, get killed and get revived with full grenade energy to spam another grenade. You didnt even have to be accurate with them. Once you get a hit, you see them burning and you finish them off. Skip grenades are the closet thing to what viking funeral grenades used to be right now. Theyre due for the next nerf.