[dogman144]

I can't find a good link for it at the moment. There are schools of thought that see the trend of "cookie-cutter creativity" as you say and point to a byproduct of digital capitalism as the cause:

The feedback loops in our system function in such a way that edge-case creativity, the fun and weird stuff that via an incubation period eventually evolve into Nirvana, the Dead, Films (not movies), Warhol, get digested and broadcast to the broader culture too quickly for the creativity to actually develop. We get a mediocre version of it as a result. Put another way, its hard for a counter-culture to develop because Tiktok, Insta, FB, Netflix production pipelines, etc.

The Society of the Spectacle is a dense but short book that covers parts of this feeling - "Debord traces the development of a modern society in which authentic social life has been replaced with its representation..." [0]

Also, Moxie Marlinspike talks about something similar with Signal in that by having end-to-end private chats, it allows that safe space but in a digital context for ideas to develop between trusted parties, which then leads into creativity (or I suppose extremism etc).

[0] https://en.wikipedia.org/wiki/The_Society_of_the_Spectacle