It's only very, very recently that I decided that arguing is completely and always fruitless. Even if you win, you anger the opponent, which means you don't win them to your point of view, just a recognition that avoiding you in mental combat is essential to protecting their world view. Preaching is effective. Teaching a willing student is effective. Debating and arguing are not.

Lively debate can be exhilarating. But, it is an exercise in ego. Only seldom are audience participants won to a new point of view. One on one teaching is much more effective. Audiences are predisposed to believe what they want to believe. Hearing eloquent arguments of both sides only gives weight to their predetermined mindset.