Then why isn't there just a "absolutely everything" queue? Why make being a mentor a requirement?
Nobody forced anyone to sign up for the mentor program either though. I think a very large population of "mentors" or at least the ones who balk at finishing what they queued up for only saw the shinies and not the actual purpose. It is not a penalty to help others, it was the entire idea behind the program. If you don't wish to subject yourself to the possibilities, don't queue at all.
Being a mentor should never have been rewarded with items the general player base just wants. The non-asian players are just too self interested. Note that I don't think this is necessarily a problem with the player base, just that the program does NOT fit your average non-asia based player. The culture and general attitudes work against the intent.