I think they are using a false scare tactic to try to raise awareness of what the age gap is all about. I do not believe the numbers are anywhere close to 1 in 10. They know it. And they have absolutely zero evidence that it is 1 in 10. They are making a gross overestimization based on faulty numbers. (Granting that there is a certain percent. But much less than 10%.)
AZ will be here eventually to defend the 1 in 10 number and he will use fuzzy math that has no basis in reality.