Yeah, I totally agree - but I define "treats" as something that we know we shouldn't have, or at least very often. So, for me, planning a low carb WOE for the rest of my life, a treat would be... hmmm some crunchy tiger bread, or spaghetti bolognese from my favourite Italian or (drooling as I type) a piece of lemon drizzle cake. I never had much of a sweet tooth, so a life without biscuits, sweets, chocolate, ice cream, cakes (except occasional lemon drizzle), desserts generally, is no big deal. Even giving up rice, root veg and cereal is not a problem (except goose fat roasters on xmas day). But the bread.... sigh.
I still eat home made bolognaise. I do a larger portion, with no pasta, but could probably get away with including a small amount of pasta. As carby foods go, pasta isn't the worst.
I'd suggest experimenting to see what you can get away with. I don't seem to spike too badly if I don't exceed 50g of carbs in one sitting, and I try to keep it to 30g for most meals. So I can have 6 Iceland chicken pakoras if I fancy them. I used to have 8 pre-diagnosis. When first diagnosed, the 15g/100g of carbs figure scared me off.
If you want that drizzle cake, then see if you can find a low carb recipe. There are some quite effective sweeteners that are non-digestible (so zero net carbs) but that still give a reasonable approximation of sugar taste. Erythritol is my favourite, so far. I find it sweetens Greek yoghurt rather nicely.
It's different for everyone, but regular bread is a killer for me. Two slices are roughly 30g of carbs, yet it'll spike me a solid 2mmol/L when 30g of most other carbs probably wouldn't. Low carb breads are available, but a lot of the reduction is in the portion sizes, so expect tiny slices. The Keto King bread maker recipe works well for me (there's a video on YouTube.) I actually like the bread it produces, and a piece the size of a thick toastie slice of a regular loaf probably has about 3g of carbs in it rather than 15. It makes nice sandwiches or bread and butter. I don't think it toasts particularly well, and it isn't good for soaking up fluids, such as gravy.
You can improve potatoes and rice by soaking and/or part cooking, then pouring away some of the starch. If you cut your spuds smaller, then par-boil and rinse them before roasting, you'll reduce their impact on your blood sugar, though to an unknown degree. These are never going to be the best foods for people with our condition, but with the right preparation and portion control, they're certainly not off limits.