Consent is the basis for all healthy relationships, whether personal or business. When all parties consent, then violence is not present and cooperation may bring a mutual advantage to all consenting parties or it may bring to light an inequity, negotiation is still possible.

All coercion is repugnant to all persons, so it's universally acknowledged that using violence against others is wrong objectively unless it's defensive. Initiating violence is universally recognized as unethical, nobody wants to be raped, if wanted, it's not rape, ditto theft.