It's the environment, code completion leads to more code. Big frameworks lead to big apps. Also, if you string together exactly what is needed in a few hours

It's the environment, code completion leads to more code. Big frameworks lead to big apps. Also, if you string together exactly what is needed in a few hours with bash, pipes, and unix command line tools you'll be called a hack, cowboy coder, and everyone will be asking where the DI framework fits into whatever would have taken them 2-4 weeks to produce.