I suspect this has a lot to do with sample selection. Because while there are statistical differences between cleanness of genders or bullying behavior, you don't really get angelic perfect girls vs evil mischieving boys unless you intentionally selects for it. And yes I am in contact with kids.
The shows like this put a lot of effort into selecting performers so that the end result is funny and entertaining. The kids knew they are performing for TV and the families that allow their kids to be on show like that are also very biased sample.
The shows like this put a lot of effort into selecting performers so that the end result is funny and entertaining. The kids knew they are performing for TV and the families that allow their kids to be on show like that are also very biased sample.