I was getting in the upper 300-s weight-wise when I started fasting regularly (I am fairly tall, but still), and I am currently on a 14 day fast at the moment myself. It's easy to get into a pattern of bad habits, and you don't even really think about it eventually. I was fortunate enough to learn about all this stuff, and I've already dropped a significant amount of weight by regular extended fasts, and then using intermittent fasting (eating once every 24 hours or so) when I am eating. This makes it much easier for me to manage my caloric intake, and if something comes along like a birthday or wedding or other special social event, I just suspend my eating regimen for that day, and then go on a few day fast afterwards to help balance it out. My long-term plan is simply to use intermittent fasting once I finish my weight loss and hit my maintenance phase. It's "just" a matter of willpower - by which I mean, it can be tough, but once you go your first week, you'll find your eating habits are changed, and you just really don't think about food.

The only real casualty of all of this is that I've had to stop watching cooking shows, which used to be my favourite thing to do, because they're too heavily associated in my mind with eating. I literally used to pop on Masterchef when I'd have dinner. Kinda sad in retrospect.