Sure. But you’re missing the main point while nitpicking.

Yes, but BMI misses in the other direction much more often. If you are overweight by BMI you are probably overfat.

Waist to height is the easiest and most accurate measure, actually.

I don’t think suggesting trying just skipping breakfast if you don’t want to eat in the morning is silly. Waiting till lunch is one way to handle not having time to prepare breakfast. Not what OP asked for but not off topic either.