If you have evidence that harm never once originated from people saying words, I'd love to see it. Otherwise, I think you're making an assertion that you'd like to be true.
Discussions have effects. That's why we have them.
Humans aren't computers. Words and actions are not always distinct. Indeed, they mostly aren't distinct. If words didn't have an effect on the world, we wouldn't have evolved language.
Sorry, i violently reject your opinion. I found it to be the source of some of the utmost terror in totalitatiran regimes, where "Words" are equal to "Traitorous actions" and thus punnished.
And i found that behind this kind of thought, usually a anti-democratic yearning for a opion dictatorship lurks.
Still, violently rejecting does not include preventing you from uttering it.