Ok so sh is good for small one-off scripts, fair enough. But why? Why shouldn't a sh language be good? Why can't I interface with other programs (that have bind

Ok so sh is good for small one-off scripts, fair enough. But why? Why shouldn't a sh language be good? Why can't I interface with other programs (that have bindings) natively in an sh? Why is it considered a good thing to make it a complete pain to do anything non-trivial with sh? As for the argument of keeping memory usage low that's a bunch of crap vm's are usually comparable or lower.