Initially the printing press resulted in LESS writers, because people just copies others works. In fact, they had to establish something called intellectual property law in order to encourage people to write again.

It was the other way around. See eg https://www.maximum-progress.com/p/the-printing-press-nfts-a... - "In 1843 alone 14,000 new works were published in Germany, close to the publication rate today in per capita terms." .. "Publishers knew that once a manuscript was out in public it could be cheaply copied by other printing press owners, so instead they sought out new manuscripts in pursuit of a first mover advantage on publishing. In addition, they created fancy special editions for wealthy customers to differentiate their product from what other printers could easily copy with mass market paperbacks."