As someone who's been playing the game daily for the past 6 months.
I think that's a very egotistical way of seeing things.
Currently a lot of "META" builds will have advanced mastery, (tai med, Earth wind, wind water, wind wm, water wm are a few examples off the top of my head)
To punish users who have decided to play a certain mastery combination by not allowing them to have advanced which essentially ends up gimping them after putting months in to reach level 60 is far from fair.