The thing about real life is, when you do something stupid, it normally costs you. In books, the heroes can make as many mistakes as they like. It doesn’t matter what they do, because everything comes good at the end. They’ll beat the bad guys and put things right and everything ends up hunky-dory.
In real life, vacuum cleaners kill spiders. If you cross a busy road without looking, you get whacked by a car. If you fall out of a tree, you break some bones.
Real life’s nasty. It’s cruel. It doesn’t care about heroes and happy endings and the way things should be. In real life, bad things happen. People die. Fights are lost. Evil often wins.