Guys... before you think the Tulku system ain't that important... perhaps you should read this article again...
http://www.dorjeshugden.com/all-articles/the-controversy/enlightened-path-enlightened-tulkus/"The Tulku system is so very important within Tibetan Buddhism in general and in particular within the Gelug system. We will die, we will reincarnate and we will take rebirth. So if we practice the Tantras correctly, one of the side benefits is that we can control our rebirth. If we can have control of our rebirth, then why can’t Tulkus? If it is logically possible for us to take charge of our rebirth and future incarnations, then isn’t it also logical that there can be Tulkus among us who have done just that?
Among the Tulkus, there are many level of attainments also. Their ranks within the Buddhist schools or height of their thrones do not always indicate their attainments. How far a Tulku has progressed on his/her path in his/herprevious lives is how much control he/she will have over his/her rebirths.
The Tulku system is indeed still alive, active and thriving. With this system, many great Tulkus are able to return, be recognized and continue their work. It is very important for the Dorje Shugden lineage Tulkus to return among us. It proves to everyone clearly that practicing Dorje Shugden does not bring negative states of rebirth. It is very logical, for how can the worship of a Buddha such as Dorje Shugden bring damage in any way?"
I guess being recognised as a Tulku helps the Tulku to continue his work and make it grow. And like what the article said there are many levels of Tulku... if a does not returns and does not continue to do what He is supposed to do, then perhaps this is not a a very highly attained Tulku. In our Gelug lineage this system of Tulkus so far has been quite good in a sense you see most Tulkus continue what their previous life work has left off or continue to spread the Dharma and expand further. Although it is just a label and a title, but with this label and title it can reach out to many more people, help more people's faith and belief in reincarnation and their conviction in that there is really "highly attained" beings... WHY NOT? If it benefits why not is what I think.
Honestly when I myself first heard of this "Tulku" system, I was quite amazed by it and my belief in reincarnation and attained beings started to grow from here as I got to know and learn more about them. So hence, it does have a great deal of benefit. Nothing is every 100% perfect because this is samsara but is there is more benefit than dis-benefit, then good!