Not just writers…there’s unions for every piece of the pie and they all have members and pensions and have to justify their existence.
There’s the ever-increasing restrictions and cost of shooting in California and the huge incentives other localities offer to film and even commercial (advert) projects. My friend just flew the whole production to Louisiana to shoot a 30 second commercial because of the incentives.
There’s the fact that even if a new show or movie is good, it is competing not only with other new stuff but also with the entire back catalogue of everything ever made that is instantly available for viewers.
There’s streaming rights, that never paid as much as traditional TV even though it had broader reach.
There’s competition with phone / social platforms that continue to optimize their content and algorithms with shorter feedback loops and more additive content, against trad production which takes a ton of money and time and upfront cost.