I know exactly what he means. At the playwrights' Christmas get-together, where all the old Theatre Writers' Union members but me were now or had been Emmerdale writers, I was asked why I had never written for TV. Good question. Once a very well known TV playwright, who is known also for generously helping other writers, put my name forward to a TV drama executive. Well, you can't imagine a better leg-up than that, can you? But guess what, it got me nowhere: my track record of prizewinning radio plays and literary prose fiction (about which the drama exec was very complimentary) were just not the right qualifications for an aspiring TV playwright - quite the opposite, I suspect.
Kelly's comments also apply to the system of 'writer development' in most of our new-writing theatres, which I've written about before, and of course, while Kelly is writing about playwrights, the same applies for writers of books.
'...it's time we let new writers be who they want to be, without forcing them to make artificial decisions about who they are and what they should write.'