People outside the US will use Tether.

Tether is not an American company.

People in the “Global South” use Tether in place of conventional bank accounts. So no KYC, which means the surveillance capabilities you’re alluding to are mostly fake news. As if the US government gives a shit about someone in Chile buying groceries with non-KYC Tether.

The real story is Tether allowing the rest of the world to have access to the US dollar, which they gladly use to improve the quality of their lives.