A lot of these conspiracy theories actually harm genuine sex abuse and trafficking victims.
Such victims are, near universally, from highly vulnerable backgrounds. The majority of trafficking victims are from countries with a high level of poverty, generally developing countries and former communist countries. The typical way a teenager or adult is trafficked is through being groomed into agreeing to travel to a Western country to take on a legitimate job as a secretary or nanny. Once they arrive they are told they owe huge fees to the trafficker (for the cost of transporting them, arranging the non-existent paperwork, housing them, etc.) and must work as prostitutes or domestic slaves to pay back these ever-increasing 'fees.' With younger children the traffickers present themselves as potential adopters or adoption agency staff, and groom the parents into agreeing to letting their children go in the belief they will be adopted and given a wonderful new life in Western Europe or America. The relatively small minority of Westerners who are trafficked are highly vulnerable and have no one looking out for them: kids in care, teen runaways, homeless. Again the tactics used are grooming and emotional manipulation.
The majority of media attention and conspiracy theories never mention teenage girls in Bangladesh or Moldova being groomed into accepting a 'job' that's really a front for forced prostitution. Or kids in care with no one looking out for them. They don't mention that most trafficking victims are groomed, not snatched. The focus is usually on white kids, Western kids, middle class kids. Violent abduction. Stranger abduction. In the 90s and 2000s there were all kinds of email hoaxes doing the rounds saying stuff like "Maisie-Joe, 38 from Ohio was abducted by human traffickers in a Walmart parking lot after she leaned into a car window to give them directions. If someone in a car stops you to ask for directions RUN AWAY!!! Please share to stop human trafficking abductions today!!" Nonsense. Not to mention the "Satanic Panic" elements of Pizzagate.
Compare Maddie McCann and the number of people convinced she was snatched to order by a trafficking gang, vs Virginia Giuffre (street homeless at 13) who actually was trafficked but was widely accused of being a liar or an attention-seeker who knew exactly what she was doing.
Trafficking isn't kids being snatched by strangers in vans, and it's not children being openly advertised on the Internet. It's systemic exploitation of the most vulnerable and powerless and a global capitalist society that commodifies human bodies. These theories spread dangerous misinformation.