Whether Theravada, Chan (Zen) or Vajrayana, all traditions have plenty to sink one's teeth into, enough for many lifetimes for most of us. So I have deep respect for those practitioners who devote themselves completely to their tradition and don't worry about comparisons, nor spend time browsing what others have to offer. In this case, the emphasis is both natural and completely justified, in my view.
For the rest of us who can't help ourselves, I hope that in time we develop a humble and sincere appreciation both of the differences and the common ground but most importantly of the sublime depths of the teachings and the great compassionate hearts and wisdom of the masters of all traditions. And use them appropriately to attain liberation.