"This would never happen if pedophilia were legal"
"It's incredible how society doesn't realize that these kidnappings are ultimately attributable to the stigma against pedophilia rather than pedophilia itself."
A schoolgirl living with and financially dependent on her parents meets on Internet a male (actually 40 years old) who lives thousands of km away, and wants to enter into sexual relationship with him. It would be too expensive for him to move permanently next door to her. Anyway, her parents cannot be expected to approve and fund the relationship and host him under their roof. So she arranges for him to come and pick her up, for once to travel to him for good, and sneaks out of home at night.
IF she were a 18 year old high school girl, it would be perfectly legal. Police would shrug and tell she is an adult. It would be described as "elopement", not "kidnapping"...
and these things would still happen.