The problem isn't not being able to kick people (which actually IS a problem) but the issue of the time limit. It takes some people longer to learn a dungeon. If you wipe more than three times you're almost guaranteed to time out, which doesn't help ANYONE learn the dungeon. It just forces everyone to re-queue, which for the DPS means waiting another 30 mins to have another attempt that may fail. It's why so many people just use FATEs