Because that's what everyone does? You learn by studying other's people work and try to apply it to your own. Painters, musicians, architects, etc … all do it.

Because that's what everyone does? You learn by studying other's people work and try to apply it to your own. Painters, musicians, architects, etc … all do it. Why not developers? Instead everyone's rushing to learn React without even knowing the DOM api. Or build a web app with 1000s of dependencies that could be done with a few PHP files. And then they say they need docker and k8s.