He doesn't because he's not the only person in the group. Have you seen what some people ask for raid LFGs? Not using Well and Luna is such a huge detriment for the whole group of 5 other players in raids. I'm someone who basically plays Titan only, and if I ever want to get into Raiding I know I need to run top sunbreaker 100% of the time if I want to partisipate. And man that's my least used tree out of all 9.