It's at this point where I have to concisely clarify what should be fairly obvious that I again can only conclude that you are being obtuse merely to avoid conceding defeat on this point.
As for the reward, I would assume that being auto grouped is enough for levelling or recently-max-level characters, the rewards beyond that (ie WoWs tokens each day) are a double edged sword. Sure they feel mandatory to top tier PvE players, but for newbies they are a godsend because they get gear faster and the benefit of experienced players. Given that there are more newbies and casuals than hard cores I would imagine that overall the effect is positive but I agree that it isn't all positives. But overall I think the system is beneficial. Bare in mind that without the LFD tool the hard cores would take longer to get their tokens, so while it may feel mandatory they are still reaping the rewards.