First, I dare you, hell, I triple dare you to walk up to a powerlifter, look him/her straight in the eyes and call him/her a fat slob because they are powerlifter.... Also, look up Tim Henriques here and look at his profile picture.
Second, keeping fats and carbs below 30% is NOT a "better way". It is your opinion only. it truly depends on the individual and how they react to food. As no two people are exactly alike, you don't have the answer. I prefer low carbs. It does not mean it is superior to all other diets, it just means that "I" prefer low carbs. I found that out by trial and error and what worked best with my body and lifestyle.
Saying that keeping your heart rate up and the weight will go down is just false. I can guarantee you that if I eat 10 000 calories a day (hard, but doable and keeping in mind your 60-30-30 diet plan) and keep my heart rate up, I will not loose weight. I will actually make things worse as my heart will have to work harder to pump blood as I gain weight.
What you do is find a diet and work out that fits your lifestyle, be consistent and enjoy the journey.