If this is a major problem, and this does need to be addressed, I would suggest that it should be defined more precisely to say that these are the types of relationships that we are targeting, and define them with reference to exploitation or whatever the situation might be, to more narrowly define what is the focus here.
The section 293 definition is much broader than what is being targeted here, and the interpretation that is given is not the same one that is used in the criminal courts. If this is a problem, focus your definition. The scope of the problem clearly is not the scope of this inadmissibility or the way this inadmissibility has been framed.