Certainly the immigration piece is significant, but within the sex trade industry there's always a fear of prosecution for other offences. There's a fear of repercussion. There's intimidation. There's a fear of personal assault. A sex trade worker could be abused physically, and sexually abused. There are a lot of other repercussions that they fear—and legitimately so.
On February 15th, 2018. See this statement in context.