Because many hear that it isn't worth it and really.....it's not....yet. Or the fear of not being good enough and pissing off your team mates. I tried it when it wasn't using lightswitch and it was still hell. Luckily it was 2 bladebancers who could stealth the the mines part and a 'lock with res so the team could live to fight another day. I will say that it feels awesome to down him and is the most rewarding kill since Atheon the first time. If you haven't, try it once and make there is no lightswitch during the battle. In truth he isn't that hard. Just don't lose track of who takes the poison next. Quodron is much harder.