It's not about you helping to get those rewards. It's about that some classes are just disadvantaged and some players that don't attend these events too. Furthermore we can keep the reward but just change it to attend at 10 odin kills or whatever. If someone is afk he will die or be kicked so that wouldn't be that annoying. Everyone would have the same chance and this can only be fair because the game is a purely team based game. Everyone does their part and should have the same chance.
Loots:
?.?.12 - Wormbane
4.6.18 - Penetrator
?.?.12 - Wormbane
4.6.18 - Penetrator