The Broken Window is fallacious.
The story of your grandfather is a testament to the resiliency of the free market. It’s a natural human tendency to solve problems by innovation to improve their situation. If he lived in an environment where resources weren’t being destroyed he could have accomplished much more and progressed faster.
When resources are consumed by government then we are like salmon swimming up stream. We are getting up there but at a slower pace than if the stream wasn’t flowing at all.
It’s true that tough situations do help build character but artificially creating those situations, by destroying resources, is not the most productive way to do so. It’s best not to add insult to injury.