Well that's how the game was designed to be like. If a guild owns a castle, they can't own nodes. So it's a choice between free castle money or join other guilds that gets challenges and PvPs. It'd be nice if they changed how siege works but I don't see any major change on that ever happening so this loophole is least that we can ask to be fixed. I think that would be way too complicated and impossible for Kakao/PA to implement. Node wars are in open environment unlike RBF so those high gs ppl could just take off their gear and equip it after the node wars starts. It can't be controlled.