I'm not really sure what you mean by "They should be targeting all businesses to clean up their act." Stuff would have limited resources so I'm not sure they could be expected to conduct an exhaustive search of all major businesses/organisations and publish a comparative analysis so as to not hurt the feelings of one particular entity. That said, if you read their section on #metoo (
https://www.stuff.co.nz/national/me-too-nz) you will see that they have done investigations and commentary into RBD, Parliament, NZDF, NZ Cricket, TVNZ, etc. So it's not like they are crusading against only RBD.