I am at ideal body weight.

Ideal for what? The question is worth finishing, because the answer changes everything downstream.

Ideal for climbing the station stairs without stopping. For sleeping through the night. For a knee that has to last another forty years. Those have real answers, and not one of them is a number somebody quoted at you when you were fifteen.

A scale measures a single thing and reports it with tremendous confidence. Your life is measuring dozens. Decide which one you actually want to be good at, and let the number ride along as a passenger.