Sensible dieting talks about 10% reductions in intake along with light exercise.

Trying to manage that by those labels would be impossible.

However eating packaged processed foods isn’t a very good way to lose weight anyway.

I lost 180lbs a few years ago by cutting processed food, soda and alcohol out of my diet. Didn’t change anything else.

I presume the carbs in veggies are pretty much accurate by weight a carrot is a carrot (except for water content).