The scholars and siddhas of the various schools make their own individual presentations of the dharma. Each one is full of strong points and supported by valid reasoning. If you are well grounded in the presentations of your own tradition, then it is unnecessary to be sectarian. But if you get mixed up about the various tenets and the terminology, then you lack even a foothold in your own tradition. You try to use someone else's system to support your understanding, and then get all tangled up, like a bad weaver, concerning the view, meditation, conduct, and result. Unless you have certainty in your own system, you cannot use reasoning to support your scriptures, and you cannot challenge the assertions of others. You become a laughing stock in the eyes of the learned ones. It would be much better to possess a clear understanding of your own tradition.