This is a singular event - how can you find a "lesson" here
If you can demonstrate a history or show a pattern or something maybe
But this sort of outran du jour tends to mask rather than expose actual dangers
Unfortunately, this is not a "singular event". It is only being widely reported because of this transgender silliness.
The real lesson is NEVER let your kids go into public restrooms without an adult.
Sexual abuse of children is a huge issue and while most of it is someone they know, there is a lot that isn't.
And there is a very good chance if it happens to your child, you won't know it until they are about 45 years old, sometimes earlier but almost certainly long after they are adults.