This is a naïve position, utterly lacking nuance.

What constitutes coercion? Is it truly voluntary if that alternative is starvation or privation?

Does "everything" include respecting the property rights, the possession of objects by others? What if I don't volunteer to honor your rights?

Statements of principle lacking rhetorical rigor are platitudes and propaganda. They serve no objectively practical purpose.

Formulating rigorously phrased statements entails effort and requires expertise. It's far to easy to dismiss the value of those elements in any constitution any any laws or regulations derived under such authority.