You are completely right. In a sense, it is also what draws people to Twitter. There is a low barrier to entry if you want to make an account to just broadcast to your family, fans (if you are celebrity), advertise for companies, collect people for activism (whether political, economic, or social media activism), etc.
Then again, there are probably better mediums for this. If you want to talk to your friends, why not use Facebook? If you want to advertise your art, why not go on tumblr or Soundcloud? Nowadays, the only Twitter accounts that seem to get much traffic are celebrities and companies (I am thinking particularly Twitch as I don't go on twitter much) advertising.
Then again, there are probably better mediums for this. If you want to talk to your friends, why not use Facebook? If you want to advertise your art, why not go on tumblr or Soundcloud? Nowadays, the only Twitter accounts that seem to get much traffic are celebrities and companies (I am thinking particularly Twitch as I don't go on twitter much) advertising.