Calories in/out is a bad way to put it.

If you find a house built all out of kilter, it does not mean it's because "tape measures don't work!!!"

It means the tape measure wasn't properly used in some or many ways.

Professional body builders and figure models use CICO every single day and the results are obvious. They're analogous to a skilled craftsman using a tape measure expertly.

However, without having "CICO School" to teach people that craft, there's a better way to explain it and hopefully, for them to understand.

The obesity is excess energy. Plain, simple, factual. Excess energy. From whatever.

And, the excess energy is a result of voluntarily eating too much and too often and for a long period of time chronically.

Fat accumulation through excess energy.