Yeah, sorry, but thats nonsense. Reggae is a genre in which producers and even engineers have been hugely important and have left indelible marks on the sound, the style and the history & progression of the music. Not simply because of their technical skills but due to their personalities and the fact that studios acted as de facto meeting places, hostels and a community focus for activities. Bunny Lee, Duke Reid, Joe Hoo-Kim, Tubby, Scientist, Errol Thompson, Herman Chin-loy, Jammy, Leslie Kong, Clive Chin, Junjo... These are towering figures who had massive influence.
In Perry's case his impact is perhaps even more pronounced, both because of the pool of talent he was able to attract and also because his sound was genuinely unique. There really is no one else who had the same sensibility, who exploited and marshalled artists in the same way or produced records that sound quite like his. In that sense he is similar to Augustus Pablo, an anomalous figure who approached things from a different perspective and elevated the genre in the process.