This is why one guy can now compete with say Google or Microsoft, because that guy uses code written and managed by more engineers then both Google and Microsoft have combined. Instead of paying hundreds of dollars to said companies, you can just NPM install "what you need".
Libraries/modules should help to solve complex problems where writing your own version is not optimal. Single line functions as modules, on the other hand, won't help you compete with Google or Microsoft and result in more problems than they solve. If a simple padding or "is this int positive?" is a complex problem, well, there are different professions than programmer's..
