I actually like the 24/7 news because it frees people up from being limited to seeing the news during a couple of specified hours each day. They typically have a one hour loop of news that repeats itself, so anytime of the day you can turn them on for an hour and catch up on national and world events. Although today that hour loop feels like it's 45 minutes of opinion and 15 minutes of actual news.
But I tend to agree with you, with the current practice of presenting opinion laced with a little news, we don't need them.