I agree that human trafficking depends on exploiting people who are poor and naive, who put themselves, or their children, in the hands of the trafficker in order to, as they believe, get a better life. People agree to work contracts and then can't get out. Or become prostitutes for an initially protective pimp, or they sell their children, believing it will offer the child a better life.This way, no one draws police attention to the trafficking and it can continue for a long period of time, with no danger to the traffickers that they'll be caught. It is, like drug smuggling, a business, and keeping under the police radar is how the business succeeds.
Kidnapping the child of wealthy parents from a first world country, while they are staying at a holiday resort, is extremely risky. IMO a trafficker could much more easily locate a child at, say, an orphanage in a poor country. IMO this means the kidnapper enjoyed taking big risks, the risk and getting away with the crime was probably a big part of the gratification for the perpetrator. IMO it was a kind of burglary, except instead of stealing a camera, the burglar stole a child, primarily for the thrill of it.