I don't think anyone needs the government's help to know that moving around is better than sitting all day. Whether or not one finds a way to fit that into their routine is a personal choice, but this is common sense.
But the difference for cardiovascular and respiratory systems and especially back and neck muscles is big with something as simple as basic walking exercise.
Exercise is not for weight loss, it's too stay fit and healthy. And yes, small regular exercise beats hard exhausting bursts.