Final answer:
It is false that no mainstream social justice organization has ever embraced sex workers; many feminist, human rights, and LGBTQ advocacy groups have included them in their activism.
Step-by-step explanation:
It is false that no mainstream social justice organization has ever embraced sex workers as an identity group. Throughout history, there have been various organizations and social movements that have acknowledged and supported the rights of sex workers. For instance, different feminist groups and organizations focusing on health and human rights have included sex workers in their advocacy.
Additionally, with the rise of LGBTQ advocacy and intersectional social justice movements, there has been increasing inclusion of sex workers as part of the fight for broad civil rights. It is also important to note that transgender activists have historically focused on including sex work within the scope of their advocacy, understanding the importance of supporting marginalized groups and the intersectionality of their struggles.