Do You NEED High Intensity Cardio In Your Training?

The fitness industry has been pushing the high intensity train for too long. We don't believe everyone should be spending all their time on just high intensity training.  Most people we've worked that had come from that background have been able to get better results while not starving themselves of foods and being able to train less. How? Using training methods that promote long term results and not just burning calories in the short term.