It might just sound like something off TV Tropes to you, but even the Labor government's own inquiry [1] on the matter shows that hundreds if not thousands of children were actually molested by such gangs. It even has a chapter on "Denial", which brings your comment to another light:
> Instead, flawed data is used repeatedly to dismiss claims about ‘Asian grooming gangs’ as sensationalised, biased or untrue. This does a disservice to victims and indeed all law-abiding people in Asian communities.
For your reading:
[1] https://assets.publishing.service.gov.uk/media/685559d05225e...