You are missing a key point here. Eating less and doing more exercise is hard.
I for one have lost weight before by doing both. But put it back on because it's hard.
Less food, might be substituted by better food. Or even just eating less crap .
That isn't. Like my missus says to me, you put it in your mouth you fat fuck, no-one is forcing it in and walk the fucking shops, don't take the car, don't sit on your fat arse watching telly, go for a 30 minute walk instead. I was a right lazy twat before I met her, just subtle tweaks have made a big difference.
I get that there are health issues that can cause weight gain, I've got thyroid issues so I know, but far too many people make excuses for being lazy. Go look at any retail park with a McNasty's and look at the queues at dinner and tea times for the drive through, as So Howard says, there are deliveroo and Uber eats drivers all over the place,. Look at the amount of people who use the .com deliveries rather than go the shops. Next door to me are bone idle, pizzas and takeaways delivered, Tesco and Morrisons deliveries delivered and guess what, they're all getting fatter and fatter. She drives to the school to pick the kid up, its 400yds FFS. Eat more fruit and veg, cut out the processed shite, cook fresh, walk not sit gawping at your phone/the telly.