I believe you, but I'd like to understand why. :)

It seems to me that a module and also PyInit_xxx() can be loaded portably.
Say the handles to the module are cached somewhere after loading and
initializing.  I think this already happens in Python/dynload_shlib.c.

Why can't another module use a slightly modified form of _PyImport_GetDynLoadFunc()
to get any non-static function apart from PyInit_xxx() by re-using the cached
handle?