I'd argue this is mostly because kids have the time to sit there and figure it out. They also have zero expectations for the way things should work, so they can

I'd argue this is mostly because kids have the time to sit there and figure it out. They also have zero expectations for the way things should work, so they can try to do something until it does what they want. Not sure this is valid argument for building a device that the majority of users will find frustrating. I think the problem I have with iOS/iPad OS 13 is that Apple went into this as a zero-sum game. Replace how it worked before, because trust their designers who know better, it's MUCH better now, right? Instead of giving people the option to try something new, to see if it makes their lives better by removing friction, they've instead added friction to some set of users. Inherent in this is genuinely a smugness and lack of empathy, that's all. People will adapt and learn to love the changes over time, but it's really not ok to do this to your users.