Weight loss and calorie! This debate is not going to settle for years to come.
For some, just being healthy and long life might be the goal. For others, strength and living with full of fun and activities might be the goal. There will be others who just want to enjoy the taste buds till the furthest point pharma companies can keep them alive. Then, there will be others who want a combination of two or more. For example, I want to live healthy, but give more importance to strength and fun while I also want to enjoy food (we all can train our taste buds to like what is beneficial to us).
Also note that I gain weight when I do more workouts - upto 62 kgs at times. Then when I don't do any workout and add more fat to the belly, I lose weight - upto 58 kg. When I train to run 10K races, I stay at 60 kg.
Whatever people/research says, if you don't know what hunger is, the chances are that you are not living healthy. Personally, I hate eating without a feeling of hunger. I will rather stay without food and water for 24 hours than eating without the feeling of hunger.
I agree with that. If you can live with two meals, nothing in between, it is very unlikely that you will gain massive weight. I live with mostly two, or rarely one or three meals a day. Weight is never a concern with this. I had tried breakfast over a month, on multiple attempts and it just feels sick unless I'm training for some endurance sport.
I still believe that hunger is a good feeling and eating only after hunger is the key to good health. If you want to know what hunger feels like, try staying away from food/water for minimum 24 hours with regular physical activities. That is the easiest way to experience hunger if you never had the feeling.