Do you ever have the urge to tell someone, anyone, about something that is on your mind?
Many people use social media exactly for that (Twitter, Facebook). If it’s not social media, they are conversing with strangers online about that.
For me, I realize that trying to persuade people of your topics (like Trump and Hillary both being idiot choices for President) is only going to hurt you. They are more likely to choose the opposite of what you are saying, simply because of the instinct.
I don’t get where the need to tell people something comes from. But making a blog allows me to rant about things, and if you read it and like it then cool. If not, then you won’t be reading it. And this way I don’t tick anyone off in the process.