They may or may not have achieved the same results with a book written differently although I'm pretty sure they wouldn't have got all the attention they have over the last few days.
The bottom line seems to me to that whatever people might think of them as people or parents, they have successfully managed to get the Prime Minister and Home Secretary of the United kingdom to ask the Metropolitan police to re open the investigation. I'd take the disapproving grumblings of a computer internet forum as a fair price to pay for that result