https://mashable.com/article/cybrothel-fulfills-a-fantasy-but-may-have-risks Baseless and dubious speculation from a British dominatrix.

Science (from British scientists) already showed that doll owners view / treat dolls differently from how they might human beings (namely, that a doll is an inanimate object, and a person is a person).

I suppose they might lead to less business for humans, although that is not necessarily a bad thing, and no one is owed a customer.