They're already bigger and stronger. They know children are taught to obey adults. Shrewd predators may also stage a scene to enhance their position of authority. They may impersonate police officers or other seemingly trustworthy people who children are taught to respect. A pedophile in a business suit A scary-looking stranger in a trench coat doesn't represent the average child molester.
Pedophiles can be pretty good at keeping up appearances.
They may be respected businessmen or professionals who blend seamlessly into the community and enjoy the trust of both children and adults. Molesters may play on children's emotions, showering them with attention. Of course, this is followed by manipulation and threats, isolating the children from the adults who could protect them. Pedophiles aren't going to lose their interest in little boys or girls. It's as simple as that.