I’ve been there and done that, as a teenager. However that was on a computer, mobile devices are much more restricted and more secured. If there is some arcane hack to bypass these it will be known and fixed.

For me the main goal is to go from “any kid can do whatever on internet, unsupervised” to “it takes effort and subterfuge to get to some stuff”.

The system doesn't need to be impenetrable. There might even be legitimate reasons for kids to circumvent it.