Another one of those oversensationalized outrage articles that can be boiled down to "I cannot put even a minimal effort in keeping an eye on my children, so I will blame someone else for it and make it their responsibility." There is literally a setting on iOS for that specific specific scenario, which allows to prevent in-app purchases[0]. And it is very easy and intuitive to set up too, so it isn't like it is hidden behind millions of menus and dark patterns.
0. https://support.apple.com/en-gb/HT204396