This is god's own truth. Weight and BMI* are bad standards. Measurements like your pants size are much better. Just how you look in the mirror is a good one too (provided you are sensible in your goals and not prone to body dismorphia, or whatever it's called).
The point about the kind and rate of food you eat is strong too. I am lucky enough to do gym work in the evening just before dinner and I have a sitting job. So I don't really need high protein and neither do I need it constantly. Other, heavier lifestyles will, and that goes to adjusting the food that you eat rather than eating much less.
@Jabubu If you insist on eating cabonara, do it for lunch and eat the wraps at dinner. That's a big load of energy you're putting into yourself just as you drop energy output levels in the evening. Also, reduce the portion size by having a salad with it (you could also do with the fibre alongside such a carb-heavy meal!).
*BMI is not great, but it's suitable in some circumstances and more useful than just weight alone, which sits right next to useless!