I don't know that it isn't, exactly, however I do know that there aren't many languages out there (that I know of?) which are viable because they have access to

I don't know that it isn't, exactly, however I do know that there aren't many languages out there (that I know of?) which are viable because they have access to this massive library of code via C + SWIG, and I wonder why. I thought of this idea one day, and did a bit of checking into C + SWIG, without much success toward figuring out why it isn't used like this. My intuition is that adding these things as standard libs is for some reason a little unclean. This solution allows language implementors to have more control over how things are implemented, and, for example, does not depend on something external like a c complier. My intuition may be very wrong.