So am I. It's cathartic and I get a dopamine hit from running my brain through my fingers into language. For me, the useful behavioral changes center around the browser's back button and the 'delete' item on the edit menu. The back button keeps me out of rabbit holes internal to me and delete keeps me out of black holes of back and forth for the sake of back and forth. Both have helped me better recognize when I am probably making more noise rather than signal. Both give me an excuse to recognize when I don't actually know what I'm saying, don't care about what I'm saying, and when what I am saying is an over-reaction.

Writing this, I'd estimate >90% of what I start typing in little online boxes gets deleted or never gets posted in the first place. I default to not posting what I type because the typing is usually enough. Maybe I should have deleted this.