Didn't the WWE hire Hollywood writers with TV experience but no wrestling knowledge in the early 2000's to write the shows?
They still do, and it's not exactly the best thing for them to do in some ways. The way I see it, WWE wants to move away from classic wrestling cliches and the only way they can do that is by hiring writers that have dramatic experience.
It would be perfect if these writers were die hard wrestling fans that also had experience working in a creative wrestling setting, but the sad truth is that most television writers will take a career in Hollywood over a career in WWE because it's far more prestigious, probably pays more in the long run and can lead to bigger and better opportunities. The writers that have been in Hollywood and are now in WWE would very likely not be in WWE if there were suitable jobs available for them in Hollywood.
So WWE needs experienced dramatic television writers who are familiar with their company, product and writing in a wrestling creative team. It's possible that WWE hopes that these "Hollywood" writers will grow into the WWE setting and eventually understand the system with the help of the existing creative team members - thereby they will eventually have the aforementioned dramatic television writers who are familiar with pro wrestling, WWE and writing in a wrestling creative team.
It's pretty similar to FCW and WWE's hiring of blank canvas talent (those with minimal experience or unknowns) so they can train them in the WWE way and make them WWE stars whilst taking the best bits of who they are and erasing the things that they don't want like previous in-ring names, looks and gimmicks.
@ Admiral_Young: Freddie Prinze Jr. is actually a die hard fan of professional wrestling and WWE, in his case it was WWE doing something right.