Yes: if under "sex trafficking" we understand [consensual] "prostitution", then in some states it is OK.
But even if "sex trafficking" is not ok -- there are various degrees of "not ok".
That is why it is important to use clear definitions in a discussion. Unclear "sex trafficking" term converts discussion from rational to irrational, when everyone is free to imagine what exactly "sex trafficking" means.
> We literally had a conversation about how, on the off chance that they’re not there by choice, we could maybe help them.
The stories that these girls told suggest that they were free to leave.