No, I don't believe that to be true.
Writing these shows is now so industrial that inspiration is never the driving factor.
It's the difficult second album problem. Your first album was a big success because you'd been polishing the tracks for 5-10 years whilst you were trying to get noticed. Youve now got 6 months to write the next album.
TV and film writers are never given the time to properly develop ideas because the industry needs more content now.
...or builder.