For the first part of your response, it's called having discipline. I love looking at beautiful girls and I love sex, that doesn't mean I'm humping every girl I see in the street. Am I superhuman because I can resist a basic human desire that is third only to breathing and eating?
I agree with you that people overeat out of habit or even boredom. That's a self-reinforcing mechanism, too. The more you eat, the more you can eat and want to eat. Feeling full can be addictive. As I indicated in another post, I went from 180 lbs to 265 lbs through lack of portion control in the last 10 years... at my worst, I was eating Japanese food in family-sized portions. I have lost 55lbs in the last 12 months by getting my portions back under control. It's the second time I am going through this, the first time I went from 143 lbs to 220 lbs when I started working, then lost fat and gained muscle to reach 175 lbs. When I started working, I switched from being very physically active (track and field, basketball, judo, cycling and rock climbing) with a keto-type diet to a helpdesk job with no control on the food available. The shitty diet worked its magic in less than 3 years, a better diet took about a year to fix it. I actually felt better at 175lbs than at 143, so I went in maintenance mode from there on.