Some (various LISP and Smalltalk environments) had a much narrower wall between the two, but I could see the case for being able to say "Your secretary never has to know about programming" even if it left flexibility and value on the table.
With the notable exception of listing the directory, which was pretty easy through a trick from the disk drive’s DOS which meant you could load the disk directory “as a program” with a special name, “$”, and then just LIST it. But you see, the drive’s DOS had to sort of go out of its way to make that simple.