When you grapple to the bull boss in Veteran Vateshran Arena - you insta die quite often to environment damage, here is a video proof

Also grappling is very clunky because toon sheaths weapon before grappling whereas void portals usage is very fluid because toon does not sheath the weapon as they are using it. Would much rather prefer void portals in here over grappling,
https://clips.twitch.tv/ObliqueCrowdedNostrilPeteZarollTie