Sounds like you are describing me to a "t". I wouldn't have admitted it a couple years ago, and to me it was all about payoff.
Coming out of college, I was working 60- to 80-hour weeks, grabbing fast food for most meals, never exercising. I figured I was young and should push myself to work as much OT as possible if my boss would approve it while I was still capable. Well, before I knew it I was about 315 and stressed out of my mind. Eventually, I started waking up with my heart just pounding in the middle of the night and decided enough was enough. I had tried just exercising before, would lose a little weight, but then put it back on when I got busy again because I didn't change my diet. Diet plays probably a much larger role in your health than exercise. Obviously, the two go hand in hand, and I'm not saying I don't indulge in a cheeseburger, pizza, or shake from time to time, but that food can't be a staple of your diet. And it's not just calorie counting either. Certain calories are better than others. I bet most overweight people who drink multiple cans of pop a day would drop 15 lbs or so in a month of not drinking it and doing nothing else. I'm no nutritionist, but learned plenty from a boatload of Netflix documentaries. I still lack discipline more than I'd like to admit, but I make sure at work and at home I have fruit or almonds nearby so when I get hungry between meals, I have to make the choice to not eat a healthier, more convenient option. Between eating healthy and exercising regularly (not even that intense), I've gotten myself into the 200-210 range. But most importantly, I feel a lot better. As a penny pincher, I cringe when I see my grocery total because healthy food is more expensive, but it's a choice that I've decided to make.
There's a lot of reasons people become fat. Stress, economic, time/obligations, lack of discipline, or frankly not caring, leading to eating poorly and not exercising. I'm guessing for some of these overweight coaches it's a combination of the time and stress of coaching, wanting to be the best, and/or a disregard for what they are doing to their health because of the payoff they receive (or a "I've been doing this for this long and been successful, why would I change" mentality).