I for one don't "require" three meals a day, but I'm hungry in the morning, ergo, I like breakfast.

It's not so much about how often you eat but what and how much. Generally speaking, of course, I can't speak for any benefits of intermittent fasting (assuming equal daily calorie / macronutrient intake) because I'm uneducated in that regard. But TL;DR, I will agree that desk jockeys will need less calories than people with a more active job or lifestyle, and people need to adjust their lifestyle accordingly else they'll gain weight.