I do not agree with your position that two parties who enter into a contract are no longer subject to ethical judgment by others. Contract law does not invalidate ethics, no matter how appealing it is to opt out of them. As one of the asocial / decoupled people who has no social compulsion whatsoever, I voluntarily opt-in to preferring prosocial outcomes and typically deem anti-prosocial actions unethical even if our society currently accepts them.

For example, if an employee does something hostile towards society at their employer when they have the freedom to choose not to do so — and since employment is at will, they always have that freedom to choose — I will tend to judge their antisocial actions unethical, even if their contract allows it. (This doesn’t mean I will therefore judge the person as unethical! One instance does not a pattern make, etc.)

So, for me, ethical judgments are not opt-out under any circumstance, nor can they be abrogated by contract or employment or law. I hold this is a non-negotiable position, so I will withdraw here; you’re welcome to continue persuading others if you wish.