I assume even in radio and TV, not all segments are created equal. Maybe live, ad-libbed shows had a more detrimental effect, in the sense that at least scripte

I assume even in radio and TV, not all segments are created equal. Maybe live, ad-libbed shows had a more detrimental effect, in the sense that at least scripted shows employ more writers? Also, would it not make sense to look at writing even from a more indirect point? For example, millions of people enjoyed the creativity of the /Friends/ writers, without actually reading a single word. Should they be counted as successful as a book writer with millions of readers?