@BackforGood - I think what you are struggling with is realising that this is why so many diets fail. People "go on a diet" - they stop eating foods like triffles and the sticky pulled pork. They pick from the blander side of the menu when out, not what they really want to eat. They exercise self-denial and get thinner.
Then after a few months, they stop being "on a diet" and go back to eating the way they did before, because it's foods they like, and then they get fat again - because the idea of never eating the food they like is more depressing that wearing a bigger dress size.
But this, what the OP has suggested, is how it's possible to stay on a diet forever. You can have the triffle and the nice things, but only a bit of them.
For some people, they can't do that, they can't just have a bit then stop. They need to be all or nothing. But most people can learn to just limit the portion size of high calorie foods.
If you don't have a sweet tooth, then the idea of never having a pudding when out for dinner ever again might seem a sensible and achievable aim. But for a lot of people, diets fail because it's not sustainable to never have a pudding when eating out. Realising that it's ok to order a pudding without the intention of eating it all, just enough to give you the flavour, is a helpful tip for some.
Don't get me wrong, I know the OP will lose weight a lot slower if she's still having the empty calories (not empty, full of flavour, food is more than just body fuel), but it does sound like this is a more sustainable way to change how she eats for the rest of her life, not just until she hits a particular dress size/scale number.