i travel A LOT for a living and have done so for the past 21 years, so as someone that spent the vast majority of that time eating out on the road, i whole heartedly agree.
about 20 months ago, right before Covid shut everything down, i'm sitting there at 46 years old and about 285 lbs, and realized...that has to change. so i started buying groceries on the road and exercising. at that weight, i had plenty of energy reserves so if i could burn more than i took in or just broke even for the day, my metobolism would take over, and to lose the weight, that works. i lost like 70 lbs and 3 pant sizes 10 months later. 11 months after that (now), i'm still down over all about 50ish lbs, and could probably stand to lose 10lbs. but that's a whole lot better place to be than where i was back then.
but to maintain that or something close to that weight, with my metabolism and at my age, i absolutley have to change my eating habits AND continue to exercise on some type of regular basis.
otherwise, i'll be right back where i started, and at my age, it just gets harder and harder to re-lose that much weight. Now, if you are at, and maintain, a healthy weight, then in my opinion, it's all about taking care of your heart and your gut, and the only way you do that is your eating and drinking habits.