If you can go with dry to pretty dry foods for no-cook menus, then, yes, total weight will be less. Cost will certainly be lower than FD food, but pasta, quinoa, rice, dried beans, etc, are cheap, cooked options.
I'd suggest rather than total weight, you consider if you LIKE to make a hot meal or not. When I'm doing miles, I want to eat as I walk. It's a huge mental win for me to consider that while nibbling on my roast-beef wrap, crackers, beef jerky, sausage and cheese, etc, that I got another 2 miles down the trail in that 40 minutes while most other people would have say down for lunch.
If you start hiking instead of doing a hot breakfast and a hot dinner, you really save time. And weight. And complexity. And you gain flexibility. You can only prepare your pasta over your stove. But you can eat no-cook food anytime and anyplace.
No-cook breakfast: Oatmeal cookies. As sweet or not sweet as you want. With or without nuts, raisins, cranberries, etc. No stove, no pots, no fuel, hardly any food odor. Sitting around a stove on a cold morning only makes me colder. Hiking warms me up.