[crustycoder]

Because learning a new language with a different world model gets you to think about problems on a different way. A library for a language you already know will not do that to anything like the same degree.

[charcircuit]

Why? Libraries and grammar are both abstractions. The important part is how one can reframe problems and not how exactly it is written.

[crustycoder]

I suggest you actually try the exercise before making assertions like that. Mind you, there's the old saying, "Real programmers can write FORTRAN in any language"...