I think you're right. It's not very important to use twitter for a big majority. Doesn't impact day to day. But it's still massive among people in power, and it does have a good sizeable base of real people too. Technically Twitter could be used by people to create pressure campaigns on policy and real political power around important issues like health care and the wealth gap and wars. But that'll never happen. It will only create buzz and fights around hot button issues and never impact people in a real positive way for them to join.