Adults underestimate the trouble a kid will cause from boredom and curiosity and self-centredness. It’s a self-serving underestimate (the less trouble we anticipate, the less we need to do now). Pay in school IT isn’t great and frequently there’s a hobbyist going “I can make this [glorious thing] possible” and not thinking ahead to “and I also make this [annoying/ destructive/ unlawful/ inconvenient thing] possible”.

Extension to the wider software industry left as exercise to the reader.