I believe he means all of the plots. Creator driven shows still have a writing staff that don't all write every single episode but that doesn't mean they don't have a hand in each episode as a supervisor making sure each character doesn't act out of character and such.@UmaCertaPessoa: Cartoon Network and Disney Channel (of course, he won't accept Nick) do a lot of creator-driven material, so he could get a chance to write his own plots.
And he wouldn't even need to have genuine writing experience! The creators of Avatar got their own show with no writing experience and they got to write their own plots as well.
Of course, they still had experience... So he's still fucked.