I was raised by my father so you don’t have to tell me. That’s less about being an adult and more about assessing threats and your own capabilities. But that’s also something that a father would’ve taught this little nikka.Most male children raised by men know that men are stronger than them just from play wrestling/fighting and playing sports with their dads, uncles, older cousins, etc.
Only exceptions would be something like a 180+ lb middle schooler fighting with a man his size or smaller.