I am kind of obsessed with language for the past few years, and I seem to be learning a great deal about the world through looking for patterns contained in it. But I think the reason that it is called spelling, or curse words, or cursive, is because words have the power to alter people's beliefs and consequently the manner in which they experience the world. I also think this is why we call a collection of words a sentence - because we are, when we speak to someone, sentencing them to an existence shaped by the words we directed at them. You could say, we're forcing them to begin a new chapter in their lives.
So yes indeed words are powerful. They have the power to make people suffer more or less, and to make people behave in a way that will lead others to suffer more or less. And in spite of knowing this I cannot help but speak idly far too often.
As for legalese. I am waiting for someone to approach a politician speaking about mandates and ask them what language they are speaking. I want to see if they say English or Legalese.